Radian Weapons Afterburner / Ramjet - Glock 19 Barrel and Compensator

[Thy.Will.Be.Done]

87181

These look fantastic, I've seen they are in the hands of a few industry people already (Travis Haley carries one on his Glock 19X).

87182


https://www.instagram.com/p/CXUQYkaPSjx/


The review I saw posted looked very promising, let's discuss what we can about this until these get out to the market in larger numbers.


https://www.youtube.com/watch?v=1-RC-S6Ip6k

Radian Weapons webpage : https://www.radianweapons.com/en/category/pistol/1031470

This is the first compensator I'm considering buying and/or carrying on a pistol, I did not want a threaded barrel or ported barrel so this checks a lot of boxes with the small size and ease of install/removal with the taper pin which doesn't require loctite.

[GearFondler]

This comp on a G19 paired with the upcoming Cloud Defense WML should make for a sweet modified Roland Special.
I love my Roland but would like to carry a shorter version that retains most of the functionality which requires 2 things... A quality G17 length comp and a full power G17 length WML.
There are other G17 length comps already available but this one looks superior in many ways.

[Blades]

"AFTERBURNER™ + RAMJET™ together reduce recoil up to 44% when using 115g ammunition." Recoil cut almost in half? That seems like something I'd want. Nothing I need, but I like cool things.

[YVK]

I signed up for a notification pretty much when their site went up.
Vaporware, as far as I am concerned.

[Thy.Will.Be.Done]

"AFTERBURNER™ + RAMJET™ together reduce recoil up to 44% when using 115g ammunition." Recoil cut almost in half? That seems like something I'd want. Nothing I need, but I like cool things.

Glad I bought G19X time and time again after being without GLock for years, they have all the cool accessories on the market. Many I don't need but still, it's nice to have OPTIONS.

[Blades]

Glad I bought G19X time and time again after being without GLock for years, they have all the cool accessories on the market. Many I don't need but still, it's nice to have OPTIONS.

Yep. One reason to own a Glock is the abundance of aftermarket support and accessories. I'm not sure what other gun has the same support/accoutrements -- I'm guessing the P365 is getting there.

[Lost River]

87181

These look fantastic, I've seen they are in the hands of a few industry people already (Travis Haley carries one on his Glock 19X).

87182


https://www.instagram.com/p/CXUQYkaPSjx/

.

https://i.imgur.com/6uhox2C.gif

[Thy.Will.Be.Done]

https://i.imgur.com/6uhox2C.gif

Are you insinuating that I am a fanboy for mentioning he's had one for a handful of months now? This is common in the industry and I merely felt it worth noting that he's been carrying one because I happened across it yesterday searching for this product. Like it or not he does carry weight in the industry for many reasons but it was merely shared (by him on IG) out of many requests to share what he carries. I don't believe he's been the type over the years to shill for products, in fact, quite the opposite. I read that he got his Panteao videos pulled because of his comments that people shouldn't buy his old training material (old Magpul DVD's) because he felt it's not up to his current standards. I had followed him in years past and there was never any sort of shill-like behavior jumping from gun to gun sort of stuff, but who knows.

[Lost River]

Sheesh!

Better switch the Black Rifle Coffee Company to Decaf!:rolleyes:

Good thing I didn't say something humorous about anybody's favorite real life Coast Guard action figure hero!




https://i.imgur.com/n5HPQ9a.png



https://i.imgur.com/6dqSacU.jpg

[Thy.Will.Be.Done]

Sheesh!

Better switch the Black Rifle Coffee Company to Decaf!:rolleyes:

Good thing I didn't say something humorous about anybody's favorite real life Coast Guard action figure hero!




https://i.imgur.com/n5HPQ9a.png



https://i.imgur.com/6dqSacU.jpg

Well, I don't drink coffee but your post could be taken as rather trollish so I figured I'd throw it out there.

[Lost River]

Thank goodness you didn't overreact to some light natured humor..:rolleyes:

[Thy.Will.Be.Done]

Bump, looks like these might be getting into the wild soon. Considering a backorder with Optics Planet but saw something that these might be offered with different finishes, which gives me pause.

Anybody hear anything about release dates? I heard Q1 but that ship has obviously sailed and were on the verge of getting into Q3 at this point.

I was also thinking about this design more, can't help but wonder how durable these will be compared to traditional threaded barrel and compensator. Looks like a lot of metal removed on the end of barrel and while the taper screw makes it easy to take apart, does it mean weaker than a threaded barrel?

[GearFondler]

Bump, looks like these might be getting into the wild soon. Considering a backorder with Optics Planet but saw something that these might be offered with different finishes, which gives me pause.

Anybody hear anything about release dates? I heard Q1 but that ship has obviously sailed and were on the verge of getting into Q3 at this point.

I was also thinking about this design more, can't help but wonder how durable these will be compared to traditional threaded barrel and compensator. Looks like a lot of metal removed on the end of barrel and while the taper screw makes it easy to take apart, does it mean weaker than a threaded barrel?Maybe it's weaker in a "Smash it with a hammer" test but why does it need to be super strong? It gets blasted by propellant and rocked by recoil but that's about it.
I wish I had the spare dough to just grab one when they are available for a future project.

[Thy.Will.Be.Done]

Maybe it's weaker in a "Smash it with a hammer" test but why does it need to be super strong? It gets blasted by propellant and rocked by recoil but that's about it.
I wish I had the spare dough to just grab one when they are available for a future project.

Mainly thinking if the gun gets dropped on the muzzle, is it going to work after taking impacts that can happen in the course of fighting?

I don't care for destruction testing really but would love to know how exactly it was tested and what it can endure without locking the gun up or affecting accuracy somehow.

[zpelletier]

What are the chances they’ll make this for P365?

I really want to put a comp on mine but threaded barrels are illegal here 🙄 I feel like maybe it’s possible since they’re probably the most popular behind glock (or at least I can hope)

[pastaslinger]

What are the chances they’ll make this for P365?

I really want to put a comp on mine but threaded barrels are illegal here 🙄 I feel like maybe it’s possible since they’re probably the most popular behind glock (or at least I can hope)

consider getting yours ported instead

[Blades]

What are the chances they’ll make this for P365?

I really want to put a comp on mine but threaded barrels are illegal here 🙄 I feel like maybe it’s possible since they’re probably the most popular behind glock (or at least I can hope)

Wouldn't it have to be a shorter barrel to work with a P365 slide? Since they are using the P365 barrel with the longer slide.
I'd like to see one made for the G19 with a G17 slide.

[zpelletier]

Wouldn't it have to be a shorter barrel to work with a P365 slide? Since they are using the P365 barrel with the longer slide.
I'd like to see one made for the G19 with a G17 slide.

What?

AFAIK, this is a 19 length slide with a longer barrel and comp (making it the same length as a 17)
I’d love to see this for a P365 (so a longer barrel and comp coming in around the same length as an XL)

[Thy.Will.Be.Done]

What?

AFAIK, this is a 19 length slide with a longer barrel and comp (making it the same length as a 17)
I’d love to see this for a P365 (so a longer barrel and comp coming in around the same length as an XL)

Radian reps have said there will be more models to follow, obviously Glock is most popular so it comes first.

[LittleLebowski]

#SortaWant (https://pistol-forum.com/usertag.php?do=list&action=hash&hash=SortaWant)

[Thy.Will.Be.Done]

#SortaWant (https://pistol-forum.com/usertag.php?do=list&action=hash&hash=SortaWant)

Yeah, me too. The price is steep enough to be hard swallow, when you could almost buy another Glock for the same price.

[Blades]

What?

AFAIK, this is a 19 length slide with a longer barrel and comp (making it the same length as a 17)
I’d love to see this for a P365 (so a longer barrel and comp coming in around the same length as an XL)

Whoops. I had looked at the other thread about the P365 slide comp, then got confused. #oldmanbrain :)

[757_Magnum]

They're heeeeere.

https://www.brownells.com/handgun-parts/barrel-parts/barrels/ramjet-barrel-w-afterburner-micro-comp-for-g19-gen-3-sku430102122-146453-300415.aspx

[Thy.Will.Be.Done]

They're heeeeere.

https://www.brownells.com/handgun-parts/barrel-parts/barrels/ramjet-barrel-w-afterburner-micro-comp-for-g19-gen-3-sku430102122-146453-300415.aspx

Yep, I just saw those a couple days ago.

I also found on a reddit thread from what appears to be someone working for them that these are supposed to work with Shadow Systems MR920 as well. That has me really wanting one of those now.

[breakingtime91]

Man, I hope they come down and do one for the 365xl. I really love how well that little gun shoots and carries. It is really fun out shooting guys with duty guys and shadow 2s that have big boy optics with a 365xl and 407k

[kitten_frenzy]

Haven't shot it yet but:

https://i.imgur.com/ULAeokc.jpg

edit: and yes, i am aware my pistol is disgustingly filthy.

[Biggy]

Yep, I just saw those a couple days ago.

I also found on a reddit thread from what appears to be someone working for them that these are supposed to work with Shadow Systems MR920 as well. That has me really wanting one of those now.

Radian Arms emailed me yesterday and said their Gen 4 Comp *will work* with the Shadow Systems MR920 pistol, so I ordered one yesterday from Brownells. It looks like it’s going to be Christmas in July.

[Thy.Will.Be.Done]

Haven't shot it yet but:

https://i.imgur.com/ULAeokc.jpg

edit: and yes, i am aware my pistol is disgustingly filthy.

Nice package, err, I mean pistol. Daddy likey... :)

[spyderco monkey]

Haven't shot it yet but:

https://i.imgur.com/ULAeokc.jpg

edit: and yes, i am aware my pistol is disgustingly filthy.

That looks fantastic.

Going to have to snag one...and a G19 to go with it.

[rathos]

Taran Butler did a video on the barrel. Seems to work pretty well:

https://www.youtube.com/watch?v=-DAIXvBYcYE

[LittleLebowski]

Wow. Expensive.

https://www.brownells.com/handgun-parts/barrel-parts/barrels/ramjet-afterburner-intra-lok-combo-for-g19s-prod146453.aspx

[Wake27]

Wow. Expensive.

https://www.brownells.com/handgun-parts/barrel-parts/barrels/ramjet-afterburner-intra-lok-combo-for-g19s-prod146453.aspx

Just shy of $100 more than the gold standard KKM… I get that it’s shorter but missed if it’s supposed to do anything better.


Sent from my iPhone using Tapatalk

[WobblyPossum]

The price is definitely higher than the KKM barrel/como combo but is comparable to a PMM barrel/comp combo, which seems to be the current hotness. I don’t know if it functions any better than either of those two but it looks fairly low profile.

[Default.mp3]

Just shy of $100 more than the gold standard KKM… I get that it’s shorter but missed if it’s supposed to do anything better.One thing to consider is that it does not utilize a threaded barrel, which can help get around legal issues. It also makes the install a bit easier, although the flats on the KKM also help with aligning the comp, so it's not as big a deal as compared to some of the other options that don't have that option.

[Biggy]

Another review of this comp and their RSA. Hopefully mine will be delivered tomorrow and I can do some shooting with it installed on my SS MR920 this weekend.

https://www.youtube.com/watch?v=xvy8i3aAomA

https://www.radianweapons.com/coreshop/categories/pistol

https://www.radianweapons.com/coreshop/category/pistol/1472844

[mrozowjj]

I'm not big on comps on carry guns and that price really isn't really doing a lot to sway me.

[Biggy]

Heres a Vid by Aaron Cowan from Sage Dynamics discussing the recent trend of comps on carry guns; pros, cons and reasoning for considering it as an option.


https://www.youtube.com/watch?v=aKqDeVhhIg8&t=780s

[Thy.Will.Be.Done]

I'm not big on comps on carry guns and that price really isn't really doing a lot to sway me.

I used to feel the same way but cannot disregard the trend, there are good reasons. I mean, have we not seen thousands of LE depts move to 9mm from .40, etc. to improve hit probability? This is along the same lines, less recoil equals less time off target when squeezing off rounds as fast as you can under stress.

[Biggy]

My Radian Weapons Afterburner/Ramjet - Glock 19 Barrel and Compensator (GEN 4) came today. Super easy install on my Shadow Systems MR920 Combat, the barrel has a nice tight lock-up, the barrel bore looks good, the machining and finishing looks fine. I plan on getting the Radian COMPRESSOR Quick-Tune Guide Rod when it becomes available. It fits in my Tennicore Certum 3 just fine. It's raining here today, but hopefully I can do some shooting with it tomorrow.

https://i.imgur.com/BrWyo5Mh.jpg
https://i.imgur.com/UFujPw8h.jpg
https://i.imgur.com/X8cnP7hh.jpg
https://i.imgur.com/OOGkIAsh.jpg

[GJM]

Why the Radian guide rod -- you think the stock RSA won't be reliable, or are you just wanting to tune?

I have come full circle on a comp on a 9 carry gun. Now that I grip less with my strong hand, which allows better trigger speed and precision, I find the comp helpful especially with a dot.

[Biggy]

Why the Radian guide rod -- you think the stock RSA won't be reliable, or are you just wanting to tune?

I have come full circle on a comp on a 9 carry gun. Now that I grip less with my strong hand, which allows better trigger speed and precision, I find the comp helpful especially with a dot.

Using 124gr FMJ range ammo, 124gr +P Gold Dot and 147gr Federal HST standard pressure FMJ HP, I may have to tune for reliability. It is also a very well made RSA package and very easy to swap springs.

[YVK]

Got mine for the G19x today. Interesting design, looking forward to shooting it. The Radian setup adds 20% of weight over stock barrel, curious to see how it will run. Planning on trying all kinds of ammo.

Are you all setting the screw on a loctite? The instructions do not mention it.

[Evil_Ed]

Does it actually work with weaker ammo or does it short stroke? A couple of years ago I ordered a Qube (https://www.brownells.com/handgun-parts/barrel-parts/muzzle-devices/compensators/cube-compensator-for-glock--prod129095.aspx) comp, and when shooting full fat 124/147 it works great...shooting practice grade 115 (WWB, etc), it falls flat and short strokes.

Though now I'm wondering if it's more specifically an issue with that specific comp, since I don't see that CGS makes them anymore, hmm..

[Biggy]

Got mine for the G19x today. Interesting design, looking forward to shooting it. The Radian setup adds 20% of weight over stock barrel, curious to see how it will run. Planning on trying all kinds of ammo.

Are you all setting the screw on a loctite? The instructions do not mention it.

I will only be using loctite if needed, but I don’t think it will be.

[DpdG]

Using 124gr FMJ range ammo, 124gr +P Gold Dot and 147gr Federal HST standard pressure FMJ HP, I may have to tune for reliability. It is also a very well made RSA package and very easy to swap springs.

You likely already have an easy tune set-up. On Shadow’s tech Tuesday series they have touted the ability to quickly/easily change recoil springs on their guide rod using the Allen head on the end and a cross pin hole on the guide rod. Pretty sure they’re using ISMI standard springs.

[Erick Gelhaus]

I had a couple, three days with one of these last summer as part of a media event for Crimson Trace - the comp was on a media embargo at the time. I liked it, it worked with the G19 it came on. Maybe 200, 250 rounds through it. Function-wise, it far exceeded the KKM bbl/comp I bought that I've never been able to get to work for even a full magazine's worth.

[Biggy]

You likely already have an easy tune set-up. On Shadow’s tech Tuesday series they have touted the ability to quickly/easily change recoil springs on their guide rod using the Allen head on the end and a cross pin hole on the guide rod. Pretty sure they’re using ISMI standard springs.

I know.

[Biggy]

Got mine for the G19x today. Interesting design, looking forward to shooting it. The Radian setup adds 20% of weight over stock barrel, curious to see how it will run. Planning on trying all kinds of ammo.

Are you all setting the screw on a loctite? The instructions do not mention it.

IMHO, when tapered male and female connections are being used. A light to medium snug is all that is needed to keep things tight, loctite should not be needed or necessary. IMO, it is kind of the same for AR suppressor mount muzzle devices that utilize a taper, the opposing tapers are what keeps things tight. Loctite if needed, and I personally would not overly tighten the screw on this system, because over time it **could** be a bitch to get loose.

[1Rangemaster]

IMHO, when tapered male and female connections are being used. A light to medium snug is all that is needed to keep things tight, loctite should not be needed or necessary. The same for AR suppressor mount muzzle devices that utilize a taper. I personally would not overly tighten the screw on this system.

Biggy : do you know if there is a torque spec for the screw?

Speaking to functioning, pressure is critical to cycling. We went through this decades ago in IPSC(not much new under the sun). It’s a balance of pressure, spring weight, weapon condition(really dirty?) and shooter platform. It follows that higher pressure ammo, like +P, would make the weapon function better and the comp work more efficiently.
I admit this has me interested, because of the compactness of the package and company reputation.

[Biggy]

Well, I don't drink coffee but your post could be taken as rather trollish so I figured I'd throw it out there.


Biggy : do you know if there is a torque spec for the screw?

Speaking to functioning, pressure is critical to cycling. We went through this decades ago in IPSC(not much new under the sun). It’s a balance of pressure, spring weight, weapon condition(really dirty?) and shooter platform. It follows that higher pressure ammo, like +P, would make the weapon function better and the comp work more efficiently.
I admit this has me interested, because of the compactness of the package and company reputation.

15 *inch* pounds is the correct torque spec on the screw, no loctite needed. If need be, this system is easy to tune for 100% reliability for whatever range ammo or defensive carry ammo you are using, especially on the Shadow System MR918 and MR920 pistols, or using the Radian Arms tunable RSA for Glock 19 series pistols. Also, I hear they will be making this comp system available for other pistols in the future.

[1Rangemaster]

Thanks for the spec. Not to sound dismissive, but I’d rather find a good defensive round-currently 135+P Hornady, w/147 jhp Win.as back up-than go down a rabbit hole of tuning just for a specific round.
IOW, if 124+P to 147 jhp can make the combo run, then that’s a big plus for me…
Erick Gelhaus experience seems encouraging.

[Thy.Will.Be.Done]

15 *inch* pounds is the correct torque spec on the screw, no loctite needed. If need be, this system is easy to tune for 100% reliability for whatever range ammo or defensive carry ammo you are using, especially on the Shadow System MR918 and MR920 pistols, or using the Radian Arms tunable RSA for Glock 19 series pistols. Also, I hear they will be making this comp system available for other pistols in the future.

Would love one for the VP9 & P320/M18, that's whats keeping me from going for one of these now. Also hoping price will fall a bit but that seems like a long shot lol.

[YVK]

I put some 75 rounds today through it. It ran without any stoppages with SB 115 gr, Norma 124 gr, and HST 124 +P. Visually I liked what I saw on the dot the most with 124 Norma. I didn't have a video setup to see ejection pattern which is something I like doing on defensive comped guns. I think at some point I saw spend cartridges fly out at a rather flat trajectory but I don't even remember what load it was. It shot very accurately, all three loads into a sub 3 inch group at 25 yards.
I had to interrupt the session for an unrelated reason and couldn't get much into a tracking / muzzle rise part. It does shoot flatter than the same G19 with a regular barrel. Immediate question that popped in my mind was if it shot flatter than a G17, or G17 cut down to a G19 length. I don't have a G17 and rental G17 doesn't have a dot. Somebody else will have to figure that part out.

[Thy.Will.Be.Done]

I'd be most interested in finding what bullet weights/loads are showing the highest returns in terms of recoil mitigation. The ad copy says 'unprecedented' and 44% reduction with 115 gr., so my guess would be that this bullet weight gives the most noticeable difference. I'd like to know what that means at the other end of the spectrum like 147 gr, barely noticeable, or does it still work significantly enough to be worth the squeeze. I don't think many out there are running 115 gr. carry ammo, so it would seem a better baseline would be 124 gr. at minimum.

[1Rangemaster]

I think reduction is due somewhat to the perception of the shooter. What makes a comp work is gas pressure. Leatham back in the day ran a 9x25mm(?), which was a 9 mm bullet on a 10mm case. Painfully loud, I heard him comment it generated negative muzzle flip which took some adjusting.
Federal had a “+P+” 115 load which was supposed to be the bomb back in the day. Probably comes down to shot placement…
A+P load will be where I start.

[LittleLebowski]

I had a couple, three days with one of these last summer as part of a media event for Crimson Trace - the comp was on a media embargo at the time. I liked it, it worked with the G19 it came on. Maybe 200, 250 rounds through it. Function-wise, it far exceeded the KKM bbl/comp I bought that I've never been able to get to work for even a full magazine's worth.

STOP IT. Stop endorsing cool expensive shit I don’t need 😄

[Erick Gelhaus]

STOP IT. Stop endorsing cool expensive shit I don’t need 😄

THAT really wasn't an endorsement.

[757_Magnum]

I'd be most interested in finding what bullet weights/loads are showing the highest returns in terms of recoil mitigation. The ad copy says 'unprecedented' and 44% reduction with 115 gr., so my guess would be that this bullet weight gives the most noticeable difference. I'd like to know what that means at the other end of the spectrum like 147 gr, barely noticeable, or does it still work significantly enough to be worth the squeeze. I don't think many out there are running 115 gr. carry ammo, so it would seem a better baseline would be 124 gr. at minimum.

If it's anything like the Mayhem Syndicate carry comp I have on my 19.5, the effect is still noticeable on 147 gr loads. My rough estimate would be a 15 to 20% reduction in recoil and muzzle flip. I personally think it's worth it, but it's much further down the list of priorities than a RDS and ammo/training. I'll be picking one of these up to compare.

[tlong17]

It was a tough pill to swallow, but I put a box of 147 HST through one of these this morning. I also shot a box of 115 Blazer to see the difference.

I am very familiar with the feel and recoil impulse of 147 HST in a 19/45/19x. The RAMJET did make a noticeable difference. I am pretty impressed.

The 115's were softer, but not tremendously so.

I did not have any FTE/FTF issues but I am wondering if I can tune it a bit better with different recoil spring. It's early, but if it can get through a box of 147 HST, I feel pretty positive about it being able to handle anything.

[spyderco monkey]

I'd be most interested in finding what bullet weights/loads are showing the highest returns in terms of recoil mitigation. The ad copy says 'unprecedented' and 44% reduction with 115 gr., so my guess would be that this bullet weight gives the most noticeable difference. I'd like to know what that means at the other end of the spectrum like 147 gr, barely noticeable, or does it still work significantly enough to be worth the squeeze. I don't think many out there are running 115 gr. carry ammo, so it would seem a better baseline would be 124 gr. at minimum.

I'd say pressure and powder volume are the big factors.

Most 115gr and 124gr 'target' ammo is basically a -P load, quite a bit underloaded. I've seen a number of 115gr and 124gr FMJ bulk ammos that are loaded to subsonic (below 1125fps) velocity. So I'd imagine those would have the least effect with the comp.

Meanwhile Federal 9BPLE 115Gr +p+ is 38.5kpsi full power +P, and Wichesters new 115gr M1152 'Active Duty' is even slightly hotter still, at around 39kpsi / 1300+fps. Both of those loads should work exceptionally well, and would probably be the very best in terms of mass manufactured ammo. Following these would be 124gr+P Gold Dot and HST.

147gr JHP should be somewhere in the middle. Its not +p or +p+, but due to the heavy projectile weight and limited case capacity, its very likely loaded to near full 9x19 regular pressure of 34-35kpsi (so hotter then normal 115-124gr target bulk ammo.)

[DpdG]

I’ve found my G45/PMM dual port set-ups really like Fiocci 115 and 124, plus (very surprisingly) Wolf 115. Those are noticeably gassier than normal domestic brass cased standard pressure loadings. I’ve run a bit of AE/Speer 147 ball and while it runs reliably, it definitely doesn’t have as much compensating effect as the gassier loads. During shakedown I noticed the dual port PMM really didn’t like anything less than 124+p with the factory recoil spring- I run 15lb ISMI springs and can run PMC 115 without issue.

[LittleLebowski]

THAT really wasn't an endorsement.

I don’t need much to start spending money on toys :cool:

[Lon]

I’ve found my G45/PMM dual port set-ups really like Fiocci 115 and 124, plus (very surprisingly) Wolf 115. Those are noticeably gassier than normal domestic brass cased standard pressure loadings. I’ve run a bit of AE/Speer 147 ball and while it runs reliably, it definitely doesn’t have as much compensating effect as the gassier loads. During shakedown I noticed the dual port PMM really didn’t like anything less than 124+p with the factory recoil spring- I run 15lb ISMI springs and can run PMC 115 without issue.

I just put my dual port PMM JTTC Ultra on my G19.4. I ran some Aguila 124 and our 124+P GD through it and it liked them. Gonna do some more testing soon. Had to stop since the comp came loose (i didn’t have it shimmed correctly). Got that’s square away the other night.

[DpdG]

I think the PMM ultra (dual port) is a good deal more sensitive than the single port in terms of ammo/recoil spring tuning. Glad yours is working well with the loads tried so far- I'm curious if Aguilla 124 is loaded closer to NATO/+p. If yours is anything like mine, regular range ammo was about 70-80% reliable with the other 20-30% resulting in nose-up failures to go into battery.

Curious to see if Radian does slimline G43x/48 next/soon, but not sure I can resist the PMM offering long enough to wait out Radian's development cycle.

[Up1911Fan]

Any thoughts on this VS the PMM Micro JTTC? Kinda wanna pay with one or the other on one of my 19's.

[GJM]

I shot my Radian (G5 19 MOS) for the first time today. The pistol wasn't reliable with it, shooting AE 115 ball. That American Eagle load is about 135 PF, so that was a surprise.

The Mayhem runs everything.

If I was smarter, I would have thought to remove the comp with avT15 bit and see if it ran with just the Radian barrel.

[YVK]

I shot my Radian (G5 19 MOS) for the first time today. The pistol wasn't reliable with it, shooting AE 115 ball.

Disappointing. I have not had issues with mine yet, although round count is rather small. I've not tried that load.

[Thy.Will.Be.Done]

I shot my Radian (G5 19 MOS) for the first time today. The pistol wasn't reliable with it, shooting AE 115 ball. That American Eagle load is about 135 PF, so that was a surprise.

The Mayhem runs everything.

If I was smarter, I would have thought to remove the comp with avT15 bit and see if it ran with just the Radian barrel.

Well that's not exactly a powder puff load but I can't see the logic of using that with this pistol unless you just have no choice to train. I would use something +P or +P+ in this gun to really run the compensator. Perhaps this is why they are selling the guide rod along with it, because they knew some loads would be finicky.

[1Rangemaster]

I shot my Radian (G5 19 MOS) for the first time today. The pistol wasn't reliable with it, shooting AE 115 ball. That American Eagle load is about 135 PF, so that was a surprise.

The Mayhem runs everything.

If I was smarter, I would have thought to remove the comp with avT15 bit and see if it ran with just the Radian barrel.

Slightly surprised and disappointed, as Radian has advertised as gtg with 115 ammo.
We supposedly have a sample coming in a few weeks; I'll report back here. We run 124 or 147 usually as practice/training ammo.
GJM , if you know: is there a muzzle protector if the comp is not on?
Thanks for your "field reports"

[Thy.Will.Be.Done]

Slightly surprised and disappointed, as Radian has advertised as gtg with 115 ammo.
We supposedly have a sample coming in a few weeks; I'll report back here. We run 124 or 147 usually as practice/training ammo.
@GJM (https://pistol-forum.com/member.php?u=410) , if you know: is there a muzzle protector if the comp is not on?
Thanks for your "field reports"

Radian will say GJM is limpwristing the pistol, I'm sure... :cool:

[tlong17]

I shot my Radian (G5 19 MOS) for the first time today. The pistol wasn't reliable with it, shooting AE 115 ball. That American Eagle load is about 135 PF, so that was a surprise.

The Mayhem runs everything.

If I was smarter, I would have thought to remove the comp with avT15 bit and see if it ran with just the Radian barrel.

About to receive a case of AE 115 as well. We'll see if mine chokes too.

[GJM]

Well that's not exactly a powder puff load but I can't see the logic of using that with this pistol unless you just have no choice to train. I would use something +P or +P+ in this gun to really run the compensator. Perhaps this is why they are selling the guide rod along with it, because they knew some loads would be finicky.

We are in Alaska, and ammo is hard to get. That AE load runs fine in my Mayhem G19 and my 9 major Open gun.

[JCN]

Slightly surprised and disappointed, as Radian has advertised as gtg with 115 ammo.
We supposedly have a sample coming in a few weeks; I'll report back here. We run 124 or 147 usually as practice/training ammo.

I know some people are hesitant to change recoil spring weights, but if you’re changing the slide velocity you kind of have to unless you want to lose margin of reliability.

Tiny comps don’t do as much so they don’t rob as much margin.

If you want a comp that makes the gun feel softer, then you have to make other things softer to match.

It’s like changing to stickier tires on a car, you often have to change to stiffer springs / shocks if you want to maximize performance and stay within the sweet spot of reliability.

In this case with a G19 type, an NDZ guide rod and spring for $30 is the easy button.

13 pound spring will work great for most combinations (nuclear loads you might go 15).

For weaker ammo or lighter, faster ammo you could go down to 11#.

I’d go with no higher than 13# especially with 115AE.

[Duke]

I know some people are hesitant to change recoil spring weights, but if you’re changing the slide velocity you kind of have to unless you want to lose margin of reliability.

Tiny comps don’t do as much so they don’t rob as much margin.

If you want a comp that makes the gun feel softer, then you have to make other things softer to match.

It’s like changing to stickier tires on a car, you often have to change to stiffer springs / shocks if you want to maximize performance and stay within the sweet spot of reliability.

In this case with a G19 type, an NDZ guide rod and spring for $30 is the easy button.

13 pound spring will work great for most combinations (nuclear loads you might go 15).

For weaker ammo or lighter, faster ammo you could go down to 11#.

I’d go with no higher than 13# especially with 115AE.

Great post

As a serial recoil spring changer (and all things must be be comped/ported) I can attest the common “it doesn’t work with a lighter spring” isn’t usually the recoil spring but rather an imbalance of the striker to recoil spring ratio

With a 4lb striker spring you can pretty much use any recoil spring weight that suits you without striker spring drag induced failures to achieve full lock up/chamber new rounds.

If your only ammo is super hard primer stuff this isn’t ideal, but any other even medium range stuff goes bang with no worries.

[GJM]

I am reluctant to change from the factory RSA on polymer defensive pistols. With Glock and M&P pistols, and lighter recoil springs, I have seen reliability issues when your support thumb touches the slide, retarding it, and you end up slightly out of battery.

What I like about the Mayhem Syndicate comp is it runs with the OEM RSA on my Gen 4 and 5 19 pistols.

My Open gun has a 7 pound spring, and my AXG CO gun has a lighter spring, but I come down on the side of reliability under adverse conditions on the Glock, and am more comfortable with the OEM RSA.

[GJM]

Duke, I have seen enough ammo that didn't ignite with sub 5.0 striker springs in Glock pistols, that I don't go lighter in Glock carry pistols. With the great ammo drought of the last few years, we have been shooting stuff we never would have before. As an example, Belom which is good practice ammo, doesn't like lighter striker springs.

[JCN]

I am reluctant to change from the factory RSA on polymer defensive pistols. With Glock and M&P pistols, and lighter recoil springs, I have seen reliability issues when your support thumb touches the slide, retarding it, and you end up slightly out of battery.

What I like about the Mayhem Syndicate comp is it runs with the OEM RSA on my Gen 4 and 5 19 pistols.

My Open gun has a 7 pound spring, and my AXG CO gun has a lighter spring, but I come down on the side of reliability under adverse conditions on the Glock, and am more comfortable with the OEM RSA.

I think that is a very valid reason to have a factory spring.

Having a significant compensator might then require +P ammo to retain that spring and still have enough margin not to have a failure on the other end of the spectrum.

[Thy.Will.Be.Done]

I think that is a very valid reason to have a factory spring.

Having a significant compensator might then require +P ammo to retain that spring and still have enough margin not to have a failure on the other end of the spectrum.

I'd say running 124 Gr Nato stuff might be the ticket if GJM can find it locally. Is there really no +P 9mm in Alaska? Never been there but I sort of doubt that is the case.

While AE is not exactly weak, it's certainly NOT what Glock designs their pistols around. These are Nato spec guns, meaning they are sprung for heavier loads rather than lighter.

[JCN]

I'd say running 124 Gr Nato stuff might be the ticket if GJM can find it locally. Is there really no +P 9mm in Alaska? Never been there but I sort of doubt that is the case.

While AE is not exactly weak, it's certainly NOT what Glock designs their pistols around. These are Nato spec guns, meaning they are sprung for heavier loads rather than lighter.

Absolutely. And then add a compensator that acts as a muzzle brake and that slide just doesn’t have enough margin to open reliably.

It’s valid to not want FTRB failures but FTE isn’t good either IMO.

[1Rangemaster]

I have to have stock springs in dept. guns.-legal issues could arise, as well as functional. That said, still looking forward to at least test firing the Radian.
GJM : if possible, please fire a few rounds without the comp on barrel. I'm curious if just the barrel will function in the pistol. I have seen aftermarket "target barrels" cause stoppages(too tight?)
At best, we have mixed results at this moment.

[YVK]

A .380 recoil assembly changed one 9mm P365 from a little laser into I-don't-group-anymore mediocrity. I understand the principles of tuning recoil springs to mass, velocity etc but I am also not putting a two chamber - four ports comp on these gats. If those carry comps aren't within operational envelope of oem recoil springs, I am not too interested.

[1Rangemaster]

YVK : yours worked though, correct?

[Thy.Will.Be.Done]

A .380 recoil assembly changed one 9mm P365 from a little laser into I-don't-group-anymore mediocrity. I understand the principles of tuning recoil springs to mass, velocity etc but I am also not putting a two chamber - four ports comp on these gats. If those carry comps aren't within operational envelope of oem recoil springs, I am not too interested.

Sounds like it was unlocking prematurely but that's a wild ass guess, probably wrong entirely. Is that even possible without blowing up the gun?

[DocGKR]

Ran thousands of rounds of Fed and Win 147 gr FMJ & JHP through otherwise stock G19's w/KKM bbl and comp without any functional issues (https://pistol-forum.com/showthread.php?15857-G19-with-RMR06-and-KKM-compensator).

Just got three of the Ramjet's to try on G19's....will see how they do over the next year or so.

[YVK]

YVK : yours worked though, correct?

That's correct. My ramjet been fine so far and I think I already fed it some ammo that's weaker than 115 AE. I'll be doing more testing.
My PMMs, since I mentioned them here, weren't fully reliable on their first sessions but settled very shortly afterwards, with stock recoil assemblies.


Sounds like it was unlocking prematurely but that's a wild ass guess, probably wrong entirely. Is that even possible without blowing up the gun?

Yes, that's what I thought too. Soft enough to change locking/unlocking timing, not bad enough to cause out of battery problems.

[Duke]

That's correct. My ramjet been fine so far and I think I already fed it some ammo that's weaker than 115 AE. I'll be doing more testing.
My PMMs, since I mentioned them here, weren't fully reliable on their first sessions but settled very shortly afterwards, with stock recoil assemblies.



Yes, that's what I thought too. Soft enough to change locking/unlocking timing, not bad enough to cause out of battery problems.

From the M&p is a staccato substitute thread - my own experiences confirm your suspicion


Sadly I’ve also found m&ps are more sensitive to recoil spring tension/barrel lock up than other guns.

The flattest m&p recoil wise is a 5” ported with an 11lb spring but it opens up the group to man size at 100 meters. That’s not so good. 13lb has been safe for me

[1Rangemaster]

Thanks
YVK

[GearFondler]

GJM

My question, sir, is how well the Radian tames recoil compared to the Mayhem?
Both have similar plusses... Both add very little to the AOL, both are easily removed and don't require thread locker. And both are fairly expensive. So performance and reliability seem to be deciding factor between the two.

[GJM]

This afternoon, I pulled the comp off the Radian barrel, to test reliability. Same AE 115 ammo. It ran fine with the comp off. Put the comp back on, and had intermittent stoppages, similar to yesterday. After some shooting, and observing, I realized the stoppages occurred any time my support thumb touched the slide. My support thumb is on the ledge of the frame, just below the slide, but occasionally my thumb rides up some. That is a non issue on the Mayhem and stock barrels for me, suggesting the Radian, at least on this G5 19, is on the edge of function, using the OEM RSA.

It is hard for me to accurately compare the Radian to the Mayhem, as I have so many rounds with a Mayhem and am used to how it cycles. My initial gut feeling is that it does slightly more than the Mayhem, based on the shooting I did yesterday and today, plus the stoppages suggests to me the Radian is doing more.

My sense is, a lighter recoil spring will be necessary in case I brush against the slide. That leads to other issues, so given how well the Mayhem works, I am not sure the juice is worth the squeeze.

[Duke]

My sense is, a lighter recoil spring will be necessary in case I brush against the slide. That leads to other issues, so given how well the Mayhem works, I am not sure the juice is worth the squeeze.


Good follow up.

This somewhat mirrors my 2011 findings with the magic DVC-P/ Staccato XC. The 8lb recoil spring needed to keep the slide moving with the island comp barrel could be significantly retarded in motion when Thumbs touched it

[Rocket20_Ginsu]

Does anyone have any experience to share finding from retention (high pectoral index as Craig teaches it) with one of these attached? Would very much value that feedback.


Sent from my iPhone using Tapatalk

[Thy.Will.Be.Done]

This afternoon, I pulled the comp off the Radian barrel, to test reliability. Same AE 115 ammo. It ran fine with the comp off. Put the comp back on, and had intermittent stoppages, similar to yesterday. After some shooting, and observing, I realized the stoppages occurred any time my support thumb touched the slide. My support thumb is on the ledge of the frame, just below the slide, but occasionally my thumb rides up some. That is a non issue on the Mayhem and stock barrels for me, suggesting the Radian, at least on this G5 19, is on the edge of function, using the OEM RSA.

It is hard for me to accurately compare the Radian to the Mayhem, as I have so many rounds with a Mayhem and am used to how it cycles. My initial gut feeling is that it does slightly more than the Mayhem, based on the shooting I did yesterday and today, plus the stoppages suggests to me the Radian is doing more.

My sense is, a lighter recoil spring will be necessary in case I brush against the slide. That leads to other issues, so given how well the Mayhem works, I am not sure the juice is worth the squeeze.

Are you having FRB or FTE stoppages? If FRB then heavier recoil spring needed, FTE would suggest lighter spring.

[GJM]

Are you having FRB or FTE stoppages? If FRB then heavier recoil spring needed, FTE would suggest lighter spring.

Next cartridge is nose up, base of the cartridge under the breach face. Sure seems like it needs a lighter recoil spring.

[Thy.Will.Be.Done]

Next cartridge is nose up, base of the cartridge under the breach face. Sure seems like it needs a lighter recoil spring.

So it's having no problem or signs of trouble ejecting at all? You suspect that the slice velocity is too fast during the forward motion?

Does this pistol sport an optic? It's hard to be certain without taking some high speed camera footage side by side w/ the stock barrel alongside the problem comp/barrel/load.



https://pistolwizard.com/static/img/Recoil-Spring-7-18.mp4

[GJM]

So it's having no problem or signs of trouble ejecting at all? You suspect that the slice velocity is too fast during the forward motion?

Does this pistol sport an optic?

Pistol has a 509T on it.

Gen 5 19 pistols have, per my source at the factory, a heavier recoil spring weight than Gen 4 19 pistols.

[JCN]

Next cartridge is nose up, base of the cartridge under the breach face. Sure seems like it needs a lighter recoil spring.

15 would probably be a good compromise with still enough power to return the slide but just a little less stiff to allow some margin.

https://www.ebay.com/itm/173405645935?_trkparms=amclksrc%3DITM%26aid%3D1110 011%26algo%3DHOMESPLICE.DISCLISTINGS%26ao%3D1%26as c%3D241159%26meid%3D0b0f0af4528544eaa585e76ac3275e a9%26pid%3D100935%26rk%3D1%26rkt%3D12%26sd%3D25437 5195590%26itm%3D173405645935%26pmt%3D1%26noa%3D0%2 6pg%3D2332490%26algv%3Ddefault%26brand%3DNDZ+Perfo rmance&_trksid=p2332490.c100935.m3021&amdata=cksum%3A1734056459350b0f0af4528544eaa585e76 ac3275ea9%7Cenc%3AAQAHAAAA8OF5%252BpTTB9eWzF1iVTnQ DCsRnFs15ifmU3NLi%252BEYDrjKXyjs8cXxJdPsXkUADs6KOQ 659xyN1EV%252FHn1N415cr6uEBtnO5gVefRyf1obTphoV0%25 2Bguz9KbmkRfNNc8lBAyrKc68sRYVLQMgerO73DXK5iySxrfe9 mJ0r6HaG1iAEQBhEfZs5ERt9v33pEFmCmHwtP9XKb44jBAcIHX 6scm6u5aVTfkCQN4MRNeHyntQKjzu1rYIS7livFWNcN%252BTG cqCGlVbOValOXvJFoqXG%252FG6Jao25PiWsRJW9zmGfT8kFlt J8coFc5avhQN3%252FFP4emuLA%253D%253D%7Campid%3APL_ CLK%7Cclp%3A2332490&epid=26042429185

[Thy.Will.Be.Done]

15 would probably be a good compromise with still enough power to return the slide but just a little less stiff to allow some margin.

https://www.ebay.com/itm/173405645935?_trkparms=amclksrc%3DITM%26aid%3D1110 011%26algo%3DHOMESPLICE.DISCLISTINGS%26ao%3D1%26as c%3D241159%26meid%3D0b0f0af4528544eaa585e76ac3275e a9%26pid%3D100935%26rk%3D1%26rkt%3D12%26sd%3D25437 5195590%26itm%3D173405645935%26pmt%3D1%26noa%3D0%2 6pg%3D2332490%26algv%3Ddefault%26brand%3DNDZ+Perfo rmance&_trksid=p2332490.c100935.m3021&amdata=cksum%3A1734056459350b0f0af4528544eaa585e76 ac3275ea9%7Cenc%3AAQAHAAAA8OF5%252BpTTB9eWzF1iVTnQ DCsRnFs15ifmU3NLi%252BEYDrjKXyjs8cXxJdPsXkUADs6KOQ 659xyN1EV%252FHn1N415cr6uEBtnO5gVefRyf1obTphoV0%25 2Bguz9KbmkRfNNc8lBAyrKc68sRYVLQMgerO73DXK5iySxrfe9 mJ0r6HaG1iAEQBhEfZs5ERt9v33pEFmCmHwtP9XKb44jBAcIHX 6scm6u5aVTfkCQN4MRNeHyntQKjzu1rYIS7livFWNcN%252BTG cqCGlVbOValOXvJFoqXG%252FG6Jao25PiWsRJW9zmGfT8kFlt J8coFc5avhQN3%252FFP4emuLA%253D%253D%7Campid%3APL_ CLK%7Cclp%3A2332490&epid=26042429185

What is the factory spring weight? I've seen recommendations to go no more than 3 lb. below the factory with Glock. Therein lies the true problem, IMO. One spring I do not want to ever mess with in most carry pistols is the one that sets off the firing pin. I feel many are overoptimistic when it comes to downloading those springs to lighten pull weights, sure they work under ideal conditions but I feel the factories build in the extra strength knowing you can't ever guarantee ideal conditions.

https://pistolwizard.com/guides/barrel/compensator#tuning (https://pistolwizard.com/guides/barrel/compensator#tuning)

[DpdG]

I have two identically set up 19X/45 with PMM’s dual port. With stock recoil and striker springs both exhibited the exact same malfunction GJM described when running the stock recoil spring and standard pressure ammo of all weights (incl HST/GD standard pressure). 15lb recoil spring assembly from NDZ (still stock striker) resolved all issues and I’ve run 20+ matches with the set-up. If I was planning to run +P I’d go back to stock spring.

[Biggy]

Here is another Radian Afterburner Ramjet Glock Comp review. I currently have one of these on my Gen 4 based Shadow Systems MR920 pistol, and like in the review mine has also been 100% reliable with the ammo I have run through mine. I am pretty sure we will probably see these available for the Glock 43,43x and the Shadow Systems CR920 pistols at some point, since they all have the same barrel length. I think we may also see one for the standard 3.1" barreled Sig P365 and maybe the P365XL version also. FYI, there barrels have no LCI machined into the barrel hood, which great helps with carbon blow back on your pistol optic lens.

https://youtu.be/7A-NWdEKK1k

[Lon]

I really want to try one of these. A Gen 3 on my Brownells slide. Then I’ll do a side by side comparison between the Ramjet and the PMM Ultra JTTC.

Now I gotta save my pennies.

[tlong17]

Got a chance to put 150 of 115 AE through the Ramjet/afterburner combo. No issues. I ran a lot of bill drills to try and push it.

So far so good. 115 Blazer, S&B, and PMC bronze all good to go as well. 100-200 of each of those.

Hopefully it stays this way over time.

[GJM]

My NDZ 15 pound RSA arrived today, I popped it into the G5 19 MOS/509T/Radian pistol and headed to the range in high 40's and moderate rain. Did I say it was miserable out. :(

Shooting 115 range ammo, I frequently got the same malfunctions I was experiencing with the OEM RSA. Here is what they looked like:

93230

93231

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

[JCN]

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

You might also need to go lower than 15# if you tend to drag slide (you can cut a coil off the 15# to lighten it) and keep things clean and oiled until it breaks in.

[YVK]

My NDZ 15 pound RSA arrived today, I popped it into the G5 19 MOS/509T/Radian pistol and headed to the range in high 40's and moderate rain. Did I say it was miserable out. :(

Shooting 115 range ammo, I frequently got the same malfunctions I was experiencing with the OEM RSA. Here is what they looked like:

93230

93231

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

That sucks. I can't get to the range with all the activities around here to test mine until after the state match. Unfortunately they usually do not have a function test bay. Otherwise it would've been an easy way of testing things by you shooting my Radian setup. You should try yours in another G19, and I could even send you my barrel and comp to play with.

[DpdG]

My NDZ 15 pound RSA arrived today, I popped it into the G5 19 MOS/509T/Radian pistol and headed to the range in high 40's and moderate rain. Did I say it was miserable out. :(

Shooting 115 range ammo, I frequently got the same malfunctions I was experiencing with the OEM RSA. Here is what they looked like:

93230

93231

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

That is the same malfunction I had with the PMM 2 port with factory spring- resolved with the 15lb NDZ. Do you have a 13lb you could try?

[Thy.Will.Be.Done]

My NDZ 15 pound RSA arrived today, I popped it into the G5 19 MOS/509T/Radian pistol and headed to the range in high 40's and moderate rain. Did I say it was miserable out. :(

Shooting 115 range ammo, I frequently got the same malfunctions I was experiencing with the OEM RSA. Here is what they looked like:

93230

93231

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

How many rounds have you put through this setup now?

[GJM]

How many rounds have you put through this setup now?

Approximately 150. Spoke to Caleb in CS at Radian. Super nice guy. We agreed that I would try the barrel and comp in another G5 19, and if problems persist they will replace mine with a new one.

[GJM]

Just back from the range.

The first thing I did was shoot the G5 19/509T pistol, that wouldn't run with the Radian comp, now that I put the OEM barrel back in. It ran perfectly, although the point of impact was enough different to matter. With the OEM barrel, my POI was low left, meaning the Radian shoots high right. I purposefully rubbed my thumb on the slide and no issues. One thing I noticed at the end of shooting it, was the 509T had some wobble when I yarded on it, and I will investigate later.

Then I shot a stockish G5 19 with iron sights, no optic, with the Radian and the 15 pound RSA. It ran with 115 Blazer brass, even when I intentionally dragged my support thumb on the slide. Then I replaced the 15 pound RSA with the OEM RSA, and even dragging my thumb, it functioned fine with Blazer 115, AE 115 and AE 147. When I shot a few groups with it, the Radian was also hitting high right, even though the iron sights were spot on with the OEM barrel.

At this point, I don't know what to think. Some tolerance stacking in the one G19, something about the weight of the 509T, or something else?

[YVK]

Some tolerance stacking in the one G19, something about the weight of the 509T, or something else?

I remember saying tolerance stacking into the phone yesterday but since I don't really know what that means, I'll take "something else". 509T should not be any heavier than my acro p2, should it?

[Thy.Will.Be.Done]

Just back from the range.

The first thing I did was shoot the G5 19/509T pistol, that wouldn't run with the Radian comp, now that I put the OEM barrel back in. It ran perfectly, although the point of impact was enough different to matter. With the OEM barrel, my POI was low left, meaning the Radian shoots high right. I purposefully rubbed my thumb on the slide and no issues. One thing I noticed at the end of shooting it, was the 509T had some wobble when I yarded on it, and I will investigate later.

Then I shot a stockish G5 19 with iron sights, no optic, with the Radian and the 15 pound RSA. It ran with 115 Blazer brass, even when I intentionally dragged my support thumb on the slide. Then I replaced the 15 pound RSA with the OEM RSA, and even dragging my thumb, it functioned fine with Blazer 115, AE 115 and AE 147. When I shot a few groups with it, the Radian was also hitting high right, even though the iron sights were spot on with the OEM barrel.

At this point, I don't know what to think. Some tolerance stacking in the one G19, something about the weight of the 509T, or something else?

I was going to suggest the optic weight could affect things here, take it off and see if it makes a difference. The POI difference is somewhat surprising but it could be a product of the comp design, etc.

[GearFondler]

The POI difference doesn't seem unrealistic to me since it's an entirely different barrel, unless we are talking about a radical shift... couldn't something as simple as it locking up slightly differently with the slide, as compared to the OEM barrel, create a POI drift?

[GJM]

YVK also experienced a POI shift similar to what I reported. My Mayhem Syndicate barrels and comps have no material POI shift.

Turns out the aluminum Chipwiz plate had a loose screw, so I have the 509T off waiting for an OEM steel plate, so I may get a chance to shoot it without the weight of the 509T on the slide. Hope to try the Radian in a few other of my G5 19 pistols too.

[JCN]

YVK also experienced a POI shift similar to what I reported. My Mayhem Syndicate barrels and comps have no material POI shift.

Turns out the aluminum Chipwiz plate had a loose screw, so I have the 509T off waiting for an OEM steel plate, so I may get a chance to shoot it without the weight of the 509T on the slide. Hope to try the Radian in a few other of my G5 19 pistols too.

E6000 to reduce vibration in mounting plates, especially with the large and heavy mailbox optics.

Definitely the weight of it on the slide robs margin.

On aggressively comped Glocks with sizable optics, I use an 11# spring so not surprised that 115gr target ammo needs something lower than 15.

[Duke]

YVK also experienced a POI shift similar to what I reported. My Mayhem Syndicate barrels and comps have no material POI shift.

Turns out the aluminum Chipwiz plate had a loose screw, so I have the 509T off waiting for an OEM steel plate, so I may get a chance to shoot it without the weight of the 509T on the slide. Hope to try the Radian in a few other of my G5 19 pistols too.

Personally I’ve had all positive experiences with chipwiz products and Service. They took one of my 2.0 core models to spec the rmr adapter when it was learned that the optic cut is 50 Thousandths longer than the 1.0.

They shipped my gun back overnight to me, with complimentary plates etc. always kind when I’ve called.

I can’t help but notice the seemingly 50/50 nature of satisfaction that other have had with them

Not that a loose screw is their fault. Just an observation of related components in the mix

[GJM]

Personally I’ve had all positive experiences with chipwiz products and Service. They took one of my 2.0 core models to spec the rmr adapter when it was learned that the optic cut is 50 Thousandths longer than the 1.0.

They shipped my gun back overnight to me, with complimentary plates etc. always kind when I’ve called.

I can’t help but notice the seemingly 50/50 nature of satisfaction that other have had with them

Not that a loose screw is their fault. Just an observation of related components in the mix

I am about 80/20 good with them. Seems like a few years back they grew too fast for their ability to deliver, but lately they seem to be doing good stuff, on time.

[GJM]

Just back from the range.

The first thing I did was shoot the G5 19/509T pistol, that wouldn't run with the Radian comp, now that I put the OEM barrel back in. It ran perfectly, although the point of impact was enough different to matter. With the OEM barrel, my POI was low left, meaning the Radian shoots high right. I purposefully rubbed my thumb on the slide and no issues. One thing I noticed at the end of shooting it, was the 509T had some wobble when I yarded on it, and I will investigate later.

Then I shot a stockish G5 19 with iron sights, no optic, with the Radian and the 15 pound RSA. It ran with 115 Blazer brass, even when I intentionally dragged my support thumb on the slide. Then I replaced the 15 pound RSA with the OEM RSA, and even dragging my thumb, it functioned fine with Blazer 115, AE 115 and AE 147. When I shot a few groups with it, the Radian was also hitting high right, even though the iron sights were spot on with the OEM barrel.

At this point, I don't know what to think. Some tolerance stacking in the one G19, something about the weight of the 509T, or something else?

Just back from the range. My wife only half jokingly said, "you are gathering PF info, one malfunction at a time."

I shot the G19 MOS with the 509T that has been choking with the Radian, WITHOUT the optic, but with the Radian barrel and comp. First with the 15 pound RSA, with my support thumb on the slide. It ran. Repeated the same with the OEM RSA and it ran with 115 AE and Blazer. That was puzzling.

Next, I put the 509T on, and started having malfunctions. It appears that the combination of the Radian and 509T isn't happy.

[JCN]

Just back from the range. My wife only half jokingly said, "you are gathering PF info, one malfunction at a time."

I shot the G19 MOS with the 509T that has been choking with the Radian, WITHOUT the optic, but with the Radian barrel and comp. First with the 15 pound RSA, with my support thumb on the slide. It ran. Repeated the same with the OEM RSA and it ran with 115 AE and Blazer. That was puzzling.

Next, I put the 509T on, and started having malfunctions. It appears that the combination of the Radian and 509T isn't happy.

Why is it puzzling? A compensator slows the slide speed down. More weight on the slide (optic) slows the slide speed down. The Glock RSA was designed for a slide without an optic.

So slow the slide with a compensator, slow it some more with an optic and slow it some more by dragging a finger on it and it doesn’t run with even as little as a 15#.

Go down to 11# and a slide with optic will increase slide speed again. Whether it starts having issues the other direction (FTRB) is unknown if you like to drag fingers.

This is where slide lightening cuts can come into play if you need to offset the weight of the optic.

[psalms144.1]

Thread drift, but this has me wondering why Glock went AWAY from slide cuts on the Gen5 MOS 34. There can't be that much weight shaved by making the MOS cut that it needed to be offset by leaving the slide closed, can there? I'm thinking along the lines that JCN is - even if the cut reduced the weight of the slide enough to make a difference, adding a plate and optic on there is certainly going to more than make up the difference, no?

[GJM]

Thread drift, but this has me wondering why Glock went AWAY from slide cuts on the Gen5 MOS 34. There can't be that much weight shaved by making the MOS cut that it needed to be offset by leaving the slide closed, can there? I'm thinking along the lines that JCN is - even if the cut reduced the weight of the slide enough to make a difference, adding a plate and optic on there is certainly going to more than make up the difference, no?

The Glock OEM plate cover itself weighs 1.4 ounces, according to google, so many optic/plate combos with an aluminum plate or direct milled are a negligible increase in weight.

[Biggy]

Here is a link to a review of the PMM micro comp but IMO the information would also apply to the Radian Weapons comp.

https://youtu.be/rqYaCkylZaQ

[GJM]

Here is a link to a review of the PMM micro comp but IMO the information would also apply to the Radian Weapons comp.

https://youtu.be/rqYaCkylZaQ

Cliff notes version?

[Evil_Ed]

He likes it; it's a kit as the barrel is specific to the comp and has very short threads. The comp is self-centering via the rounded front nose and the frame keeping the comp from rotating; it came loose on him but he hasn't bothered to reshim/tighten/more loctite because it just seems to work.

Light 115gr has constant failure to feed/eject; you need to run at best full fat 115gr through it if you're going to go that light, otherwise again full fat 124 and 147 works well. His main point was if the lower end of the ammo power factor to upper end was low|_______|high, you need to lop off the lower end of the scale so it's just low|____|high; that's all the ammo you should ever put through it, and reassign the rest to something else.

He kind of goes off into the weeds in the video, either explaining or trying to get people to not do dumb things, which I get...but it's not really a super efficient presentation which IMO is not his fault. I'm sure he gets a lot of trolls chumming the waters whenever he does stuff, so he needs to be super detailed in his responses lest some jerk with a keyboard launch into a tirade about how he wasn't doing an apples to apples comparison with regards to which batteries he was using in his optics and how that weight differences upset the testing and all that other minutia crap...

[1Rangemaster]

We received a sample of the Radian system today, nicely packaged. I was impressed with the finish on the parts. I put the system into my personal GEN5 19 MOS with an ACRO mounted. The fit was solid, a bit better than the factory barrel(which has several thousand rounds though it). I had put a drop of gun oil and rubbed it over the outside.
We had folks on the range all day, so I only had a chance to put a couple of handful of rounds through the setup this afternoon. I left the comp off for the first rounds. On a side note as a little personal project, I put a few rounds of Underwood 115 and 147 “penetrating” ammo through with no issues. These are +P+ and +P respectively. At 15 yards, all rounds went into the black of a B8, an inch or so high. I’m not a group shooter. If I’m in the 8 ring out to 25 yards, I’m satisfied.
Then shot 5 rounds of Aguila 124 gr.ball we use for training, no comp attached; functioned. Attached compensator, torqued to 15 inch pounds. I then shot a Vickers/Hackathorn “Test”, 10 yard B8-10 rounds with a 10 second par. The score was 97 points in 8.24 seconds, all in the black, no functional issues. This is just for reference. My observation/impression was that recoil and flip were definitely “softer” and reduced. I am impressed; I should note I haven’t shot a comp on a pistol in 15 or 20 years, but still…
Obviously, there is a lot more shooting to be done, but this has definite utility. One other observation: the group was a touch high and right, although tighter than I usually shoot. I’ll try a group at 25 yards soon.

Edit to add: factory rsa used throughout.

[1Rangemaster]

Does anyone have any experience to share finding from retention (high pectoral index as Craig teaches it) with one of these attached? Would very much value that feedback.


Sent from my iPhone using Tapatalk

There’s a post upstream where there is a Hilton Yam review. I fast forwarded through it, but noted that he shot some from a retention position without harming himself. But let’s be honest here: there is gas coming out the top. Get that hole turned toward your face without eye protection and you may have a serious problem…

Sorry -edit- it’s a PMM comp, but the principle is the same.

[JCN]

The Glock OEM plate cover itself weighs 1.4 ounces, according to google, so many optic/plate combos with an aluminum plate or direct milled are a negligible increase in weight.

With a mailbox optic, it may not be just the weight but also the weight distribution since the slide doesn’t recoil straight back, it also rotates.

Even if the 115 kind of sort of functioned, you would want more margin of function. Either with significantly lighter spring or heavier (and slower) ammo.

Like said above, there are adjustments and limitations when you deviate from the stock design.

[JCN]

GJM again trying to help explain why the weight trade off might not tell the whole story.

Not trying to be snarky.

So for example, an RMR on a slide at mock full recoil. Note how the weight of the RMR is fairly close to the rotation point in the middle of the grip.

93342

Now if you change that to a mailbox.

93343

See how the weight now gets shifted rearward by another 1/2 inch or so… but it puts it farther away from the pivot point of the teeter totter.

And imagine how that needs to get hefted up and over from the rear

93344

In order to close back.

93345

Those are my thoughts about why mailbox optics might eat more margin than just their sheer weight.

[GJM]

I continue to gather data with the Radian, and it remains puzzling to me.

My iron sight G5 19 with the Radian runs 115 ball fine with the OEM RSA and the 15 pound recoil spring.

My G5 19 MOS with the Radian runs 115 ball with OEM RSA and 15 pound recoil spring. However, when I install the 509T it won't run with either the OEM RSA or 15 pound recoil spring.

YVK's 19 runs fine with the Radian and Acro with the same 115 ball and factory RSA.

1 Rangemaster's G5 19 with Radian and Acro runs with range ammo.

Obviously the Acro weighs more than the 509T by a fair amount.

Today, I installed the Radian in yet another G5 19, this one direct milled for the 407CO by Maple Leaf, and this pistol would not run with AE 115 ball. It did function with Lawman 115 which is quite hot.

Today, I feel like the Mayhem Syndicate is the sweet spot for me because it runs with pretty much anything. I am reluctant to run a light RSA in a defensive pistol and then have to balance that with a lighter striker spring. As to 115 grain ammo, my Underwood Lehigh penetrator loads are 115 grain.

[JCN]

I almost shudder to ask this question but:

Have you cleaned and oiled your guns?

A competition Glock shooter with an OEM spring and a dirty gun kept choking.

He was going to pack it up and go home.

I told him to follow me to the safety table, oiled his gun and sent him back out.

No failures. I told him to clean his damn gun.

[1Rangemaster]

I continue to gather data with the Radian, and it remains puzzling to me.

My iron sight G5 19 with the Radian runs 115 ball fine with the OEM RSA and the 15 pound recoil spring.

My G5 19 MOS with the Radian runs 115 ball with OEM RSA and 15 pound recoil spring. However, when I install the 509T it won't run with either the OEM RSA or 15 pound recoil spring.

YVK's 19 runs fine with the Radian and Acro with the same 115 ball and factory RSA.

1 Rangemaster's G5 19 with Radian and Acro runs with range ammo.

Obviously the Acro weighs more than the 509T by a fair amount.

Today, I installed the Radian in yet another G5 19, this one direct milled for the 407CO by Maple Leaf, and this pistol would not run with AE 115 ball. It did function with Lawman 115 which is quite hot.

Today, I feel like the Mayhem Syndicate is the sweet spot for me because it runs with pretty much anything. I am reluctant to run a light RSA in a defensive pistol and then have to balance that with a lighter striker spring. As to 115 grain ammo, my Underwood Lehigh penetrator loads are 115 grain.

It’s not consistent, but it seems to me there is a trend: the Radian comp setup prefers higher pressures. My combo ran with 124 gr. Aguila, which is “hotter” than your 115 AE. The lighter pressure ammo(115AE), YVK the exception, isn’t running. It’s not the bullet weight I think, but the pressure. The Underwood for example is way hotter- I’d bet it you it would run, as does the Lawman, etc.
I am no engineer/physicist, but a light bullet, lower pressure round may not be the combo. Change one parameter, projectile weight or pressure, and we’ve got function. I’m going to test some 147 and 135 projectiles and report back.
As sort of a side note, if Radian says it runs w/115s, then I’d say this one doesn’t; might be a dimensional issue with that particular unit.
I concur with your feeling to not chase different springs, etc. And if the Mayhem is working, then you have that.
FWIW, my next test unit will be G45 with a Steiner, and I’ll also plug the radian into a 509T slide that an instructor has…

Edit to add: I would be surprised if GJM gun(s) that he carries “loaded for bear”, etc., would be neglected -dirty-enough not to run. Remember, JCN, the guns are running w/o the comp. I believe it’s a pressure and/or inertia issue-lighter projectile-issue. That’s all I’ll say; not interested in going into a rabbit hole…

[JCN]

It’s not consistent, but it seems to me there is a trend: the Radian comp setup prefers higher pressures. My combo ran with 124 gr. Aguila, which is “hotter” than your 115 AE. The lighter pressure ammo(115AE), YVK the exception, isn’t running. It’s not the bullet weight I think, but the pressure. The Underwood for example is way hotter- I’d bet it you it would run, as does the Lawman, etc.
I am no engineer/physicist, but a light bullet, lower pressure round may not be the combo. Change one parameter, projectile weight or pressure, and we’ve got function. I’m going to test some 147 and 135 projectiles and report back.
As sort of a side note, if Radian says it runs w/115s, then I’d say this one doesn’t; might be a dimensional issue with that particular unit.
I concur with your feeling to not chase different springs, etc. And if the Mayhem is working, then you have that.
FWIW, my next test unit will be G45 with a Steiner, and I’ll also plug the radian into a 509T slide that an instructor has…

Edit to add: I would be surprised if GJM gun(s) that he carries “loaded for bear”, etc., would be neglected -dirty-enough not to run. Remember, JCN, the guns are running w/o the comp. I believe it’s a pressure and/or inertia issue-lighter projectile-issue. That’s all I’ll say; not interested in going into a rabbit hole…

Totally agree with your first part.

EITHER more heat or heavier bullet will help.

Second part, it was hard to tell from the picture he posted but it didn’t look clean and shiny in the slide.

93405

I’m trying to help him work through the process.

If YVK’s heavier optic slide worked but was cleaner, then that’s a strong possibility.

Cleaning and oiling his slide is an easy hypothesis check. He may have already done this. I don’t know. But if he hasn’t, it’s quite a possibility for the reason why he’s having disparate results to YVK.

Whether he still chooses the Mayhem is totally up to him and also totally valid to not want lighter springs.

Also totally valid in your case that you can’t change springs.

I am trying to help identify variables that may be confusing to him.

EDIT: the slide running without the comp or without the optic isn’t proof that he’s not running the ragged edge of margin available with the optic and comp on.

If he doesn’t want to lighten spring further, the other way to help the 15 pound spring is to clean and oil the slide including the breech face, rails and extractor claw.

[GJM]

It’s not consistent, but it seems to me there is a trend: the Radian comp setup prefers higher pressures. My combo ran with 124 gr. Aguila, which is “hotter” than your 115 AE. The lighter pressure ammo(115AE), YVK the exception, isn’t running. It’s not the bullet weight I think, but the pressure. The Underwood for example is way hotter- I’d bet it you it would run, as does the Lawman, etc.
I am no engineer/physicist, but a light bullet, lower pressure round may not be the combo. Change one parameter, projectile weight or pressure, and we’ve got function. I’m going to test some 147 and 135 projectiles and report back.
As sort of a side note, if Radian says it runs w/115s, then I’d say this one doesn’t; might be a dimensional issue with that particular unit.
I concur with your feeling to not chase different springs, etc. And if the Mayhem is working, then you have that.
FWIW, my next test unit will be G45 with a Steiner, and I’ll also plug the radian into a 509T slide that an instructor has…

Edit to add: I would be surprised if GJM gun(s) that he carries “loaded for bear”, etc., would be neglected -dirty-enough not to run. Remember, JCN, the guns are running w/o the comp. I believe it’s a pressure and/or inertia issue-lighter projectile-issue. That’s all I’ll say; not interested in going into a rabbit hole…

I bet it is pushing ten years since you sent me the Glock lubrication recommendation, and I have followed it ever since.

93406

[JCN]

Okay, I’ll just order one when they come back into stock and test myself.

Of note Radian sells a tunable recoil spring that includes a 13# so that should tell you something regarding the spectrum of weak ammo and heavy slide.

93407

EDIT: eBay FTW.

Ordered a Gen 5 for $389.
About $20 more than they were selling for at Midway but I can live with it.

[JCN]

I bet it is pushing ten years since you sent me the Glock lubrication recommendation, and I have followed it ever since.

Again not trying to be a jerk and just trying to help.

My perspective is that factory maintenance, cleaning and lubrication schedules are like car manual recommendations.

They only really apply when used in standard fashion.

When modified from a factory configuration and use, you may need a modification from standard.



We have seen factory configuration Glocks choke with even small modification from pure standard application.

Such as less than NATO ammo and even adding something like a flashlight to a rail.


Glocks seem to be engineered with a pretty narrow application window.


They weren’t designed for mailboxes and muzzle compensators.



The Mayhem comp may not rob as much margin due to relatively larger side ports than up ports.


Regardless, for the science of it, I bought a Gen 5 setup and will kit out a G19.5 slide on a G17 frame with different spring rates and test locking, accuracy and function to put out some good comparative data.

I have a 509t ACSS that I’ll mount.

Other thoughts I had were feed ramp and chamber polishing, which I often will do on a number of barrels to aid in chambering. But it’ll be easier if I just test it rather than going back and forth.

[1Rangemaster]

I’ll share some anecdotal “data”. We received at the dept. a unit as reported earlier. I plugged it into a G45MOS with a Steiner MPS(1st gen) mounted on a C&H ACRO plate. It’s my understanding the MPS is one of the heavier dots around. Additionally, there was a TLR7A attached. The compensator was secured to the barrel, torquing to 15 in.lbs. Pistol relatively clean and lightly lubed, but not pristine. This is a “loaner” gun in case another goes down, and we also test various accessories on it. I would estimate about 5-6,000 rounds on components, and recoil spring passes the Armorer test still with the Radian installed. One drop of oil on barrel, spread over outside surface of same with finger.
Zeroing. For me the combo shot 2-3 inches high and slightly left at 15 yards. I made adjustments, got the hits in the 10 ring of a B8@15, backed up to 25 yards and confirmed hits into the black-actually 10 ring-and quit that while I was ahead. This took 12 rounds of Aguila 124fmj, our usual range ammo. No stoppages.
I then decided to run some mags of different ammo just to observe function. 147 gr. Winchester jhp, check. 135 gr. +P Hornady, check. A half dozen Underwood 147 coated cast lead flat nose(“penetrator”), check. 6 of GJM “bear load” +P+115gr. penetrator, check. The Underwood stuff was shot 6 per mag as it’s been my experience that loads will sometimes fail on chambering or towards the end of a cartridge stack where the mag spring may not have as much tension. The mags had passed the Armorer check, and they were relatively new Gen5 mags. In any event, no stoppages.
I then decided to “Dutch load”(mixed cartridges) an older mag(still checks ok)with the following: 2 rounds 115gr. Winchester ball, 2 115 Underwood solid, 2 of Underwood 147gr. LFN, 2 Hornady +P 135s and 2 147 Winchester jhps (alternate duty load). I then shot the 5 yard Roundup drill to try and see how the dot was behaving. The drill has a single shot draw first, but then there are freestyle(4), primary hand only(3) and support hand(2) strings with a 2.5 second par. No stoppages, with a 98 point score for reference. Notable to me were 8 rounds within the 10 ring; the “9s” were at 12 and 6 o’clock. I didn’t notice when I pushed them. The 8 shot cluster was tight and symmetrical. Now, this is by no means definitive, but it it is encouraging concerning this system. I think GJM may have a slightly tighter unit as it works it some pistols and not others. This particular unit(unserialized) is working in the guns I dropped it into. YMMV. I like it so far.

[GJM]

I’ll share some anecdotal “data”. We received at the dept. a unit as reported earlier. I plugged it into a G45MOS with a Steiner MPS(1st gen) mounted on a C&H ACRO plate. It’s my understanding the MPS is one of the heavier dots around. Additionally, there was a TLR7A attached. The compensator was secured to the barrel, torquing to 15 in.lbs. Pistol relatively clean and lightly lubed, but not pristine. This is a “loaner” gun in case another goes down, and we also test various accessories on it. I would estimate about 5-6,000 rounds on components, and recoil spring passes the Armorer test still with the Radian installed. One drop of oil on barrel, spread over outside surface of same with finger.
Zeroing. For me the combo shot 2-3 inches high and slightly left at 15 yards. I made adjustments, got the hits in the 10 ring of a B8@15, backed up to 25 yards and confirmed hits into the black-actually 10 ring-and quit that while I was ahead. This took 12 rounds of Aguila 124fmj, our usual range ammo. No stoppages.
I then decided to run some mags of different ammo just to observe function. 147 gr. Winchester jhp, check. 135 gr. +P Hornady, check. A half dozen Underwood 147 coated cast lead flat nose(“penetrator”), check. 6 of GJM “bear load” +P+115gr. penetrator, check. The Underwood stuff was shot 6 per mag as it’s been my experience that loads will sometimes fail on chambering or towards the end of a cartridge stack where the mag spring may not have as much tension. The mags had passed the Armorer check, and they were relatively new Gen5 mags. In any event, no stoppages.
I then decided to “Dutch load”(mixed cartridges) an older mag(still checks ok)with the following: 2 rounds 115gr. Winchester ball, 2 115 Underwood solid, 2 of Underwood 147gr. LFN, 2 Hornady +P 135s and 2 147 Winchester jhps (alternate duty load). I then shot the 5 yard Roundup drill to try and see how the dot was behaving. The drill has a single shot draw first, but then there are freestyle(4), primary hand only(3) and support hand(2) strings with a 2.5 second par. No stoppages, with a 98 point score for reference. Notable to me were 8 rounds within the 10 ring; the “9s” were at 12 and 6 o’clock. I didn’t notice when I pushed them. The 8 shot cluster was tight and symmetrical. Now, this is by no means definitive, but it it is encouraging concerning this system. I think GJM may have a slightly tighter unit as it works it some pistols and not others. This particular unit(unserialized) is working in the guns I dropped it into. YMMV. I like it so far.

I plan to call Radian and see about a replacement.

[1Rangemaster]

And I think that’s a good idea. They advertise a drop in; sometimes things don’t “drop” like they should. My limited experience with Radian is that they make good products-have some AR stuff-and are responsive.
Best of luck!

[JCN]

I plan to call Radian and see about a replacement.

Again not trying to be a jerk and it’s totally valid to require more margin in a carry / duty gun.

Can you clarify that the gun ran 100% with the 15# when you didn’t contact slide with fingers but if you touched the slide while gripping then it induced malfunctions?

Not insinuating or castigating, just trying to help with the science.

[JCN]

If I consciously brought my support thumb down it seemed to run, but if I even lightly brushed the slide with my support thumb, I hit a malfunction every time. Not sure what I have going on, but it isn't encouraging.

Can you also clarify for science whether YVK setup works with him shooting it or with you shooting it?

Having a grip that drags the slide will need more slide velocity both in recoil and return.

But the positive part is that your thumb is acting like the muzzle brake!

[JCN]

93539

[JCN]

93549

Still waiting on some lower parts to make it full tacticool.

But it’s a start.

[JCN]

I like these micro comps.

With a little brûlée torch action, fits nicely in a G19 threaded barrel holster.

93556

[JCN]

93581

On the docket for today

[JCN]

Worked fantastic with all ammo except for the 124gr subminor Eley.

Was able to induce the GJM malfunction with the ammo too weak for spring.

93583

1Rangemaster it chokes with super weak 124 but functions with weak 115gr.

Again it’s more complicated than just weight or just speed. It’s a combination.

The two hypothesis for GJM’s malfunctions are:
1. He got a bad unit.
2. Having a thumb dragging grip is not compatible with a medium compensator and weak ammo.

As an aside, I could make the Radian function subminor with a way weaker spring but I don’t think there’s enough margin to feel comfortable for me.

[YVK]

I plan to call Radian and see about a replacement.

I approve this message. TLDR: mine Radian runs with weak ammo.


Expanded version: G19x cut down to G19 grip, ACRO P-2 mounted through a Unity Atom plate, lubricated to the usual standards as pictured somewhere above. Both OEM and Magpul magazines were used. Stock recoil assembly.

PMC 115 gr that usually chronos at 128-130 from my CZ: normal grip, ran without stoppages but with anemic ejection. Thumb-dragging the slide brought the ejection down to a dribble but the gun ran.

AE 115 gr, usual PF 132-135: normal grip, no issues, decent ejection. Actively and purposely pushing the thumb into the slide shortened the ejection but I couldn't induce a stoppage.

Norma 124 gr (feels like a 140 pf to me): zzzzzzip.

Interesting bit: I had to dismount and remount that ACRO before this session and after remounting it again shot high and right, despite witness marks aligning perfectly.

[JCN]

I approve this message. TLDR: mine Radian runs with weak ammo.


Expanded version: G19x cut down to G19 grip, ACRO P-2 mounted through a Unity Atom plate, lubricated to the usual standards as pictured somewhere above. Both OEM and Magpul magazines were used. Stock recoil assembly.

PMC 115 gr that usually chronos at 128-130 from my CZ: normal grip, ran without stoppages but with anemic ejection. Thumb-dragging the slide brought the ejection down to a dribble but the gun ran.

AE 115 gr, usual PF 132-135: normal grip, no issues, decent ejection. Actively and purposely pushing the thumb into the slide shortened the ejection but I couldn't induce a stoppage.

Norma 124 gr (feels like a 140 pf to me): zzzzzzip.

Interesting bit: I had to dismount and remount that ACRO before this session and after remounting it again shot high and right, despite witness marks aligning perfectly.

That all jives and suggests you’re almost out of margin with weak ammo and stock spring and should think about a softer RSA spring.
And that if you had a limper wrist or stickier thumb you’d have a malfunction.

I was surprised that the Syntech 115 ran since I peened the heck out of my rails to tighten them up and I can barely hand cycle the slide.

The Eley PCC makes about 125 PF in an 8” barrel so I expect it’s 115 power factor or lower out of a handgun.

It doesn’t cycle in my EDC X9 either so no surprise there.

I was pretty pleased with the effectiveness of the comp. It looks pretty too.

[YVK]

If that thing ever gets carried, it will be stuffed with a 124 or 135 +P. I am good with a stock RSA.

[HeavyDuty]

The sexiest part for me is the 17 holster compatibility.

[GJM]

I approve this message. TLDR: mine Radian runs with weak ammo.


Expanded version: G19x cut down to G19 grip, ACRO P-2 mounted through a Unity Atom plate, lubricated to the usual standards as pictured somewhere above. Both OEM and Magpul magazines were used. Stock recoil assembly.

PMC 115 gr that usually chronos at 128-130 from my CZ: normal grip, ran without stoppages but with anemic ejection. Thumb-dragging the slide brought the ejection down to a dribble but the gun ran.

AE 115 gr, usual PF 132-135: normal grip, no issues, decent ejection. Actively and purposely pushing the thumb into the slide shortened the ejection but I couldn't induce a stoppage.

Norma 124 gr (feels like a 140 pf to me): zzzzzzip.

Interesting bit: I had to dismount and remount that ACRO before this session and after remounting it again shot high and right, despite witness marks aligning perfectly.

Great news! Looking forward to a replacement, and it running like the Mayhem Syndicate does, which is no fuss with a variety of ammo, normal Glock recommended lubrication, and using an OEM RSA. Going back and forth between stock 19 barrel and a comp, the comp really makes the 19 shoot like a more capable pistol.

[YVK]

The sexiest part for me is the 17 holster compatibility.

The sexiest part is when all the ladies on public range who came with their dudes stopped watching their dudes shoot.

[JCN]

Great news! Looking forward to a replacement, and it running like the Mayhem Syndicate does, which is no fuss with a variety of ammo, normal Glock recommended lubrication, and using an OEM RSA. Going back and forth between stock 19 barrel and a comp, the comp really makes the 19 shoot like a more capable pistol.

I don’t think that will ever happen, because science.

The Mayhem uses larger side ports.

The afterburner is purely up ports.

The way it retards a tilting barrel and slide is more effective.

Even YVKs barely dribble out with the 115 if there’s slide thumb drag, suggesting little margin with the OEM RSA.

It’ll never be like the Mayhem.

Being anchored to an OEM RSA while using non-OEM parts is a strategy for mismatched physics.

You can’t have it both ways from a physics standpoint. If you want a well functioning comp, you have to make the necessary changes in the system.

For something like duty use and duty grade ammo there’s probably enough wiggle room in the system.

[willie]

This unit increases weight of barrel/slide combination which is a factor in determining slide velocity. The comp reduces recoil impulse, also a factor in determining slide velocity. And then there is the need to experiment with spring weights to insure reliability. It's an interesting gismo for certain. I surmise that installing the device will introduce too many variables that would degrade what we call Glock reliability.

[HeavyDuty]

Interested enough to preorder one from Brownells - they have a $40 off coupon today (“THANKYOU”) that makes it a little less painful.

[1Rangemaster]

In about 150 rounds yyesterday, I had one failure to chamber; I believe it was a 147gr. Winchester fmj. It occurred when I was trying to bench the gun-which I hardly ever do-to get a 25 yard group. I'm calling this one a combo of poor grip and a "jackass" position trying to lie across the shooting bench-
Because...
We had several instructors shoot the Radian bbl./comp(combo) today, factory rsa. This was over drills with two handed and one handed-each hand-and reloads, stoppage clearances(set up), etc. No unplanned stoppages over~300 rounds.
This combo continues to be of interest with the caveat that it's carried with "duty"(+P or better) ammo. I feel fairly confident that +P in 115 to 147 weights will run.
And now, a couple of folks want to run it in competition so there's that...

Edit to add: I shot a 285 on the FBI bullseye course. Points down pretty much me. The barrel groups well.

[Up1911Fan]

Still trying to decide between one of these or the PMM Micro JTTC. I carry 147gr Gold Dot and primarily practice with 147gr Lawman or AE.

[Thy.Will.Be.Done]

This unit increases weight of barrel/slide combination which is a factor in determining slide velocity. The comp reduces recoil impulse, also a factor in determining slide velocity. And then there is the need to experiment with spring weights to insure reliability. It's an interesting gismo for certain. I surmise that installing the device will introduce too many variables that would degrade what we call Glock reliability.

I take offense the phrase 'Glock reliability', to me it's much more of a question mark going by real world footage of shootings. Hell, you may end up improving the reliability if you play your cards right.

[willie]

Certainly I can't refute possibilities of improving reliability by tinkering but hold the opinion that stock Glocks demonstrate fewer malfunctions than non stock specimens.

[JCN]

Still trying to decide between one of these or the PMM Micro JTTC. I carry 147gr Gold Dot and primarily practice with 147gr Lawman or AE.

Should work fine. I like the design of this better than the JTTC which I own. Will work better with a slightly lower recoil spring weight.


Certainly I can't refute possibilities of improving reliability by tinkering but hold the opinion that stock Glocks demonstrate fewer malfunctions than non stock specimens.

… when shot with duty power ammo.

I see a LOT of stock Glocks choke on the range when newer shooters buy weak target ammo and try and put it through a new gun.

1Rangemaster YVK GJM

I set up “worst case” scenario today.

Subminor ammo. Heavy mailbox optic. Flashlight. Peened slide. And added a Kagworks raised slide stop that drags against the slide. You can see the marks where it’s rubbing.

93645


https://youtu.be/Ou52hHqT2iU

Soft.

Works with a VERY weak recoil spring.

This is the limit of what I can do with this ammo and this heavy of a slide before having FTRB type malfunctions. Can run a lighter optic or have lightening cuts on the slide if I want to add back more margin.

Everything is a push and a pull trade off.

You can’t get something for nothing and there is no free lunch.

[YVK]

This offseason is going to be expensive. One of the things on the list is to run a bunch of 124 and 135 +P HST, Gold Dots, and Hornady loads through all my carry guns and try to just choose one or two.

[1Rangemaster]

This offseason is going to be expensive. One of the things on the list is to run a bunch of 124 and 135 +P HST, Gold Dots, and Hornady loads through all my carry guns and try to just choose one or two.

YVK: the major mfgs. are pretty good-as in 1 failure of ammo over tens of thousands of rounds. There’s another recent thread where some are disparaging 115 cheap ammo-yep. The original 9 load was around a 124/5 gr.bullet. NATO spec stuff same weight, pretty high pressure. Something like the Underwood 115 +P+ or the old 115 Federal +P+ I’d feel pretty confident in. We’ve run 124, 135 and 147 jhp in stock guns for years with no real issues. So I suppose what I’m trying to say is pick some ammunition from a well known mfg. and drive on…
Wait, I think some other internet guy- Dr. Gary Roberts, said sorta the same thing…
Last comment: in the course of shooting some quals late yesterday, one individual had a FTF with quality 124 ball. Turns out THAT case had no flash hole. I’ve seen several hundred thousand rounds of this ammo fired; FIRST issue. I’ve heard of it once with Blazer and once with I think Geco years ago.
So, practice a stoppage clearance every now and then…

[JTPHD]

I’ve just installed this on a MR920. Is it normal for the slide to come in contact with the comp when returning to battery? The slide appears to make contact with the comp near the end of the cycle and both units move together until lockup. I torqued the screw to the recommended specs, and the pistol chambers a round with no issues. Just don’t want to beat up my slide unnecessarily if this is abnormal. TIA!

[GearFondler]

I’ve just installed this on a MR920. Is it normal for the slide to come in contact with the comp when returning to battery? The slide appears to make contact with the comp near the end of the cycle and both units move together until lockup. I torqued the screw to the recommended specs, and the pistol chambers a round with no issues. Just don’t want to beat up my slide unnecessarily if this is abnormal. TIA!Comps do not usually contact the slide at any point... Close but not touching. As far as I'm aware anyway... There are about a million options now days.

[1Rangemaster]

Folks-tossing this out there:
Does anyone have ideas or procedures for cleaning the comps? I seem to recall some cautions about not scraping/damaging anodizing, but didn't find anything searching.
Any information would be appreciated.
FWIW, did a little more shooting with the Radian system today-50 rounds on drills with no issues.

[JCN]

Folks-tossing this out there:
Does anyone have ideas or procedures for cleaning the comps? I seem to recall some cautions about not scraping/damaging anodizing, but didn't find anything searching.
Any information would be appreciated.
FWIW, did a little more shooting with the Radian system today-50 rounds on drills with no issues.

The radian is basically one huge up port. That’s why it’s pretty darn effective.

93743

And why it’s going to behave differently than the Mayhem.

On the up side… it probably will NEVER need cleaning since it’s just a huge port. It’s not going to have eddy current deposits like some of these small hole, multi baffle compensators.

[JCN]

I haven’t shot Glocks in forever, but with the hump reduction it indexes sooooo nicely for me now.

Afterburner works.


https://youtu.be/pxwjv741wjI

Hit factor was upper 7s. Mainly alphas, some Charlie’s.

[psalms144.1]

I haven’t shot Glocks in forever, but with the hump reduction it indexes sooooo nicely for me now.

Afterburner works.


https://youtu.be/pxwjv741wjI

Hit factor was upper 7s. Mainly alphas, some Charlie’s.At the very end of the clip it looked like the slide didn't go into battery? Recoil spring issue?

[JCN]

At the very end of the clip it looked like the slide didn't go into battery? Recoil spring issue?

That was the very weakest ammo that required a VERY weak spring that basically had no margin with that ammo and I knew it. It was just a test run to convince myself that it wouldn’t have enough margin.

As per previous discussions, there is no free lunch and you’d have to lighten the slide or shoot hotter ammo to get back margin.

Since then I’ve chosen to increase ammo power and spring rate.

Physics is physics. There’s always a trade off.

[psalms144.1]

Totally got it. Worked really well right up to that point, so for a game gun, if that's the only time it bobbled, what's the harm.

Of course, I'm a "kilt on da streetz" guy, so that would make me WILDLY uncomfortable - so I'd probably sell the whole thing and start over. No one ever accused me of rationality!

[JCN]

Totally got it. Worked really well right up to that point, so for a game gun, if that's the only time it bobbled, what's the harm.

Of course, I'm a "kilt on da streetz" guy, so that would make me WILDLY uncomfortable - so I'd probably sell the whole thing and start over. No one ever accused me of rationality!

I think that’s reasonable for equipment that absolutely needs more margin and most people don’t have the ability to test it in compromised conditions.

I’ve had enough experience in testing limits of things that work “fine” on a square range when clean, but choke when that sliver of margin gets eaten up by movement or transition or dirt.

So I usually try and keep a 20% margin or so in the system.

As for LEO using compensators in the field, it may work fine in square range testing but there WILL be a decrease in the operating margin when adding OEM spring and a heavy optic unless the system has been specifically engineered for that.

If I were a LEO, I wouldn’t run a compensator with an optic on a Glock even with +P ammo unless my department let me use a 15 pound spring.

If your spring is too heavy, the gun doesn’t run.
If the spring is too light (but still 15#+) all you get is a little frame battering with super high round counts when using HOT ammo.

[JCN]

93764

8.69 seconds on “The Test” from a holster.

99 pts with 4x, shot just once.

I attribute the vertical stringing to the ACSS reticle that isn’t precise at those distances where you’re trying to put the general part of the chevron in the target.

Clusterfrack

I like it very much for distance and for larger targets.

[Clusterfrack]

93764

8.69 seconds on “The Test” from a holster.

99 pts with 4x, shot just once.

I attribute the vertical stringing to the ACSS reticle that isn’t precise at those distances where you’re trying to put the general part of the chevron in the target.

Clusterfrack

I like it very much for distance and for larger targets.

Good shooting! I like that ACSS also. Do you have the big circle turned on? If so, thoughts?

[JCN]

Good shooting! I like that ACSS also. Do you have the big circle turned on? If so, thoughts?

First thought is that on a black B8 trying to hit the X ring at 10 yards I ran into the same issue I had with the triangle DPP. It was just hard to judge and gauge when I was perfectly on target. Because the bottom of the triangle is below the bottom of the X ring. Whereas with a small dot reticle the bottom of the red streak is the bottom of the X.

So harder to judge finesse work with that reticle at intermediate distances.

At farther distances I can trigger to point of chevron but I’m slowing the recoil and need more visual confirmation anyway.



About a week ago, I thought maybe the large circle would work and be cool. At medium paces I though it was neat…

But then I ran it hard and fast and it failed me the way I thought it would…

It distracted me on presentation and caused hesitation and cost speed and accuracy. Usually I just “go trigger” on red when close. But can’t do that when the red can be a ranging circle.


So I haven’t had the big circle on for a few weeks and it’s a nope in the way I thought it would be. I gave it a chance though.

[GearFondler]

First thought is that on a black B8 trying to hit the X ring at 10 yards I ran into the same issue I had with the triangle DPP. It was just hard to judge and gauge when I was perfectly on target. Because the bottom of the triangle is below the bottom of the X ring. Whereas with a small dot reticle the bottom of the red streak is the bottom of the X.

So harder to judge finesse work with that reticle at intermediate distances.

At farther distances I can trigger to point of chevron but I’m slowing the recoil and need more visual confirmation anyway.



About a week ago, I thought maybe the large circle would work and be cool. At medium paces I though it was neat…

But then I ran it hard and fast and it failed me the way I thought it would…

It distracted me on presentation and caused hesitation and cost speed and accuracy. Usually I just “go trigger” on red when close. But can’t do that when the red can be a ranging circle.


So I haven’t had the big circle on for a few weeks and it’s a nope in the way I thought it would be. I gave it a chance though.I had a similar experience with the DPP Triangle reticle... I had it mounted on a CZ Scorpion and at 25 yds for instance it just seemed to slow me down. Instead of just shooting the dot I found myself trying to concentrate on making sure the tip of the triangle was on target, which also led to being "dot focused" instead of target focused, and it all turned into an aggravating mess.

[Up1911Fan]

First thought is that on a black B8 trying to hit the X ring at 10 yards I ran into the same issue I had with the triangle DPP. It was just hard to judge and gauge when I was perfectly on target. Because the bottom of the triangle is below the bottom of the X ring. Whereas with a small dot reticle the bottom of the red streak is the bottom of the X.

So harder to judge finesse work with that reticle at intermediate distances.

At farther distances I can trigger to point of chevron but I’m slowing the recoil and need more visual confirmation anyway.



About a week ago, I thought maybe the large circle would work and be cool. At medium paces I though it was neat…

But then I ran it hard and fast and it failed me the way I thought it would…

It distracted me on presentation and caused hesitation and cost speed and accuracy. Usually I just “go trigger” on red when close. But can’t do that when the red can be a ranging circle.


So I haven’t had the big circle on for a few weeks and it’s a nope in the way I thought it would be. I gave it a chance though.
I found it interesting and surprising to learn in a Kyle Defoor class that he uses the circle only on his 507K.

[JCN]

I found it interesting and surprising to learn in a Kyle Defoor class that he uses the circle only on his 507K.

The circle on the ACSS is humongous and not for aiming purposes per se.

This is what it’s like:

93779

It’s to help people find the dot. But if you have really good index you see the circle as you’re on the way to the dot… and it can cause confusion temporarily that you’re seeing your dot when you’re seeing the circle.

Because when you move very fast it’s not a dot, it’s a streak and at really fast speeds it’s hard to tell a dot streak from a partial circle streak. It makes my brain go “whaaaa?”

[1Rangemaster]

At lunchtime today, went by a dept. which has a B/C silhouette at 50 yards. ~50 rounds of duty 147 jhp fired, standing unsupported. Pistol was a G45, 1st Gen Steiner MPS w/Radian assembly, stock rsa and light attached. I had no stoppages. A guest LE instructor wanted to try the setup. He fired about 5 rounds, and had a failure to feed w/the jhp. The range had a partial box of 115 ball. I loaded a mag with that, and went through the mag without an issue.
I wrapped up the little session with the old "3-fifty-7" drill/test:1 shot of 147 jhp from ready in 3 seconds or less at steel silhouette@50 yards-7 consecutive hits to "pass". Passed.
Consensus amongst personnel who tried it is "it's softer". Well, yes; but that means extra comp weight and bleed are taking some of the energy. I plan on doing more single handed shooting to see if I can induce a stoppage.
I'd still carry with the caveat that duty ammo necessary.

[JCN]

I plan on doing more single handed shooting to see if I can induce a stoppage.
I'd still carry with the caveat that duty ammo necessary.

It’s really too bad that your department doesn’t allow spring modifications. Like for example there are reports that the new “duty” Springfield Prodigy is undersprung from the factory.

Just because it comes some way from the factory doesn’t mean that’s the best option.

If you’re going to allow the afterburner… and Radian offers an adjustable RSA as a factory part…

Could you see if they would sell you a LEO “combination package” that included afterburner + 15 pound spring assembly and ask your department to approve the two together?

[JTPHD]

250 rounds with a mix of Federal 115, 124 gr. Loads, and 100 Speer Gold Dot 124 +Ps, the Radian performed without issue. Shadow Systems MR920 with a stock 17 lb. RSA. I’ll probably try a 15 lb. spring in the interest of science.

https://youtube.com/shorts/W8C83yH2RlI?feature=share

[Biggy]

250 rounds with a mix of Federal 115, 124 gr. Loads, and 100 Speer Gold Dot 124 +Ps, the Radian performed without issue. Shadow Systems MR920 with a stock 17 lb. RSA. I’ll probably try a 15 lb. spring in the interest of science.

https://youtube.com/shorts/W8C83yH2RlI?feature=share

I am guessing the Shadow Systems MR920 slide *might* weigh a little less than a Glock OEM slide. How was the accuracy with the Radian comp ? Also, is the comp slightly touching the slide on the top when in battery ? Pistol comp manufactures can easily change the efficiency of a comp my an easy edit to it’s CNC machine program.

[JTPHD]

I am guessing the Shadow Systems MR920 slide *might* weigh a little less than a Glock OEM slide. How was the accuracy with the Radian comp ? Also, is the comp slightly touching the slide on the top when in battery ? Pistol comp manufactures can easily change the efficiency of a comp my an easy edit to it’s CNC machine program.

I’m not sure of any slide weights (I have the combat slide). I initially thought the slide was contacting the comp upon installation, but was mistaken- no apparent wear issues to the cerakote. Accuracy out to 25 yards is comparable to the OEM barrel with the loads tested. Overall, it appears promising.

[HeavyDuty]

30 days in for my Brownells backorder…

[Blackbag]

I just signed up for the email notification at Primary Arms. Their "qualified sale price" for LE is the cheapest price I have seen around for the barrel/Comp. Now the wait is on.

[GJM]

I received the replacement Radian barrel and comp for the G5 19. I installed it in the same pistol that I had problems with previously. I did remove the 509T and replace it with a 407 CO on a CHPWS plate. I did install the Radian guide rod with their 15 pound recoil spring. Cleaned the pistol and lubed it when I put it all back together. Here it is:

95052

I started shooting Belom 124 grain range ammo, because that is what my wife and I were using for the rest of our practice session. This ammo runs in her Legion and my Open gun. I experienced a number of light strikes with this ammo, which I have seen before in Glock pistols with this ammo, as the Belom seems to have hard primers. Besides the light strikes, which are irrelevant to the comp function, the ammo wouldn't feed. I next tried a few rounds of 115 PMC that were in the bottom of my range bag, and it wouldn't function the comp. I had 50 rounds of AE 147, and that functioned 100 percent. I next shot a magazine of Gold Dot 124+P and it was 100 percent. I shot the Gold Dot on the head of the target at 20 yards. Started with this, and liked what I saw.

95053

I shot the rest of the magazine and got this. Very happy with this load and barrel combination.

95054

For giggles, I ran the same Belom in a G19 with a Mayhem comp, and it functioned fine. I can only conclude that the Radian comp requires higher power factor ammo to function, or there is some tolerance stacking between the Radian and this particular pistol.

[Up1911Fan]

I received the replacement Radian barrel and comp for the G5 19. I installed it in the same pistol that I had problems with previously. I did remove the 509T and replace it with a 407 CO on a CHPWS plate. I did install the Radian guide rod with their 15 pound recoil spring. Cleaned the pistol and lubed it when I put it all back together. Here it is:

95052

I started shooting Belom 124 grain range ammo, because that is what my wife and I were using for the rest of our practice session. This ammo runs in her Legion and my Open gun. I experienced a number of light strikes with this ammo, which I have seen before in Glock pistols with this ammo, as the Belom seems to have hard primers. Besides the light strikes, which are irrelevant to the comp function, the ammo wouldn't feed. I next tried a few rounds of 115 PMC that were in the bottom of my range bag, and it wouldn't function the comp. I had 50 rounds of AE 147, and that functioned 100 percent. I next shot a magazine of Gold Dot 124+P and it was 100 percent. I shot the Gold Dot on the head of the target at 20 yards. Started with this, and liked what I saw.

95053

I shot the rest of the magazine and got this. Very happy with this load and barrel combination.

95054

I know it was only 50 rounds, but what we're your thought's on it with the 147gr AE? I've been curious about one of these or the PMM Micro, but typically only shoot 147gr ammo. Is the comp worth it or would it really only be a benefit if shooting faster 124gr loads?

For giggles, I ran the same Belom in a G19 with a Mayhem comp, and it functioned fine. I can only conclude that the Radian comp requires higher power factor ammo to function, or there is some tolerance stacking between the Radian and this particular pistol.

[EVP]

Excellent shooting GJM,

On a side note not to derail the thread, do you find gold dot ammo to be more accurate then HST? You cannot ask to much more from your carry ammo/gun/shooter combo.

[GJM]

I believe a comp on an optic equipped Glock 19 makes the pistol shoot like a more capable pistol. I have been shooting 147+P Underwood hard cast through the comp and it seems to help.


Excellent shooting GJM,

On a side note not to derail the thread, do you find gold dot ammo to be more accurate then HST? You cannot ask to much more from your carry ammo/gun/shooter combo.

For the last 5-10 years, 124 +P Gold Dot has been my default JHP load, and I have less experience with HST loads. I have been very pleased with the accuracy of Gold Dot in most pistols.

After shooting my Open gun today, I got to shoot my 19 with the Radian some more. First, I shot 75 rounds of AE 147, and it was reliable. Next I shot one box of 20 rounds of Underwood 147+P coated hard cast, and it functioned. Here was the group I shot, at 18 yards.

95103

Next I shot a box of 20 rounds of the Underwood 115+P penetrator load, and it functioned fine. Here is a ten round group at 18.

The Radian seems fine with higher power factor ammo.

95104

[GJM]

I have about 300 additional rounds of AE 147 and Lawman 115 through the Radian without issue. One thing I have noticed, compared to the Mayhem, is the Radian cylinder seems in the right side, with sometimes a round on the edge of hanging up when you chamber a round.

[GJM]

I have about 300 additional rounds of AE 147 and Lawman 115 through the Radian without issue. One thing I have noticed, compared to the Mayhem, is the Radian cylinder seems in the right side, with sometimes a round on the edge of hanging up when you chamber a round.

Darn iPhone -- Radian seems to have a tight chamber.

[1Rangemaster]

Darn iPhone -- Radian seems to have a tight chamber.

Thanks for the correction. It does seem like the Radian system is very well made. I have not personally had any issues, and a few of our instructors are playing with these on the side in competition, etc. I’ve shot some 147 training ammo (ball) and a few 135+P Hornady loads the past two days- no stoppages. This included one handed shooting. This, coupled with my shooting some Underwood 115+P+ and 147 +P and GJM s reports of these working indicate to me I’d run this with factory full power ammo.
YMMV; we will continue our usage and report.

[Up1911Fan]

Got an instock email from a retailer today and was going to order one. 12 minutes later and already sold out.

[GJM]

A few days ago, I shot a few boxes through a 19 with an OEM barrel, and then a similar amount through a 19 with the Radian. If I had to choose, I would unquestionably buy another G19 before a comp. The comp makes it shoot better, but for defensive use, it probably falls into the inconsequential increment category.

[Backspin]

GJM, thank you for posting your observations regarding comps in general. I recently spent a bunch of ammo doing some comparisons on equipment upgrades to my Glock 17, and I was surprised to find I got way more max performance increase (based on group size shooting doubles at 10 yards) from changing the recoil spring to 15# than using a PMM comp.

Even shooting one handed the splits were not that dramatically different for me between comp and no comp.

[JCN]

GJM, thank you for posting your observations regarding comps in general. I recently spent a bunch of ammo doing some comparisons on equipment upgrades to my Glock 17, and I was surprised to find I got way more max performance increase (based on group size shooting doubles at 10 yards) from changing the recoil spring to 15# than using a PMM comp.

Even shooting one handed the splits were not that dramatically different for me between comp and no comp.

It’ll be subtle with standard pressure 9mm.

Go 9 major or 357 Sig and it’ll be clearer.

[GJM]

My Open 2011 shoots flatter with 9 major ammo than with box regular 9mm loads.

[HeavyDuty]

I’m still on the Brownells backorder for this, I’m hoping it comes through soon. I have a box stock 19.5 MOS virgin waiting for it; my idea is that the barrel and comp can be switched in and out with the stock barrel as desired. It shouldn’t be hard to figure out what the ACRO needs both with and without the comp, at least roughly.

[HeavyDuty]

Has anyone gotten their barrel and comp recently?

[YVK]

Mine continues to run problem free. 50 rounds of 124 +P, whatever I tried to do to make it fail didn't work. 50 rounds of regular pressure 124, one handed from both sides, not problems. G19, ACRO, and OEM recoil assembly. Maybe I'll try to shoot it without lubrication next time just for giggles.

[JCN]

I’m a bunch of thousands of rounds into it.

Haven’t cleaned it yet.

It locked up hard with a FTL (that I thought was a FTE).

Couldn’t even mortar it out.

Just a PSA that people might want to clean it every once in a while. Seems tighter than a factory barrel.

[JCN]

Love the afterburner system so much that I’m buying another.

Gen 5 isn’t available in stock so I’m going to outfit a Gen 3 slide and afterburner for use on a Gen 5 G45 frame.

Would just be for a practice gun so no worry about cross compatibility.

[HeavyDuty]

Brownells has to come through on my back order eventually, right?

[GJM]

https://www.gunsamerica.com/digest/44-recoil-reduction-enter-the-radian-afterburner-ramjet/

[HeavyDuty]

https://www.gunsamerica.com/digest/44-recoil-reduction-enter-the-radian-afterburner-ramjet/

Interesting comment about the chamber.

[YVK]

https://www.gunsamerica.com/digest/44-recoil-reduction-enter-the-radian-afterburner-ramjet/
Interesting comment about the chamber.I thought it was funny that the dude just went ahead and dremeled up the chamber.

[JCN]

Interesting comment about the chamber.

You know, I never looked at the chamber but that’s likely why I had such a lock up jam with a dirty gun.

[JCN]

Would love this for a Glock 32…

Wonder if I could cut a 31 barrel into an afterburner host…

And use it on a 31 frame…

Also picked up someone’s low round count Gen 4 afterburner off Enos for $380 shipped to play with.

[JCN]

96596

Hoping to get some time to play.

[HeavyDuty]

96596

Hoping to get some time to play.

Dammit, you got two from Brownells? My backorder is for one, and has been since 8/29.

[JCN]

Dammit, you got two from Brownells? My backorder is for one, and has been since 8/29.

No sorry, one is from gunbroker and the other is from Enos. The slide is from Brownells. Everything just arrived at the same time.

From my experience waiting on Radian charging handles for MPX last year, it’s sometimes many months before they do another run so I wasn’t going to wait.

But instead of the Gen 5 afterburners I’m making do with Gen 3/4.

[JCN]

96599

If I use a 31 frame and barrel and a 32 slide.

And cut the barrel to adopt the afterburner it would look like this:

96600

Which would be quite nice.

Also, the Gen 4 afterburner aesthetically looks fine on a Shadow Systems MR920 Slide.

96601

96602

[Evil_Ed]

I thought it was funny that the dude just went ahead and dremeled up the chamber.

Wait - so this thing comes with a stepped chamber, and dude in the article didn't understand what/why and didn't spend the 20 seconds with google and "9mm stepped chamber" and dremelled it out?

Oy vey..

[Simong]

Will the Ram-Jet work on this Brownells G-19 Gen-4 slide?

It's not really clear if it will work reading the Q&A from Brownells website

As you can see in the images the Brownells slide is a little different than the original Glock slide

T.I.A

Simong

[JCN]

Will the Ram-Jet work on this Brownells G-19 Gen-4 slide?


Looks like it works.

96715

[JCN]

HeavyDuty

Dremeled an ambi release cut in a Gen 3 slide to use on a Gen 5 frame.

96909

96910

[JCN]

96920

I might trim the 17 dust cover.

[Simong]

Looks like it works.

96715

Thanks for the info, ordered.

Simong.

[Lon]

96920

I might trim the 17 dust cover.

Have you done anything else to that 17 frame to get the 19 slide to work?

[JCN]

Have you done anything else to that 17 frame to get the 19 slide to work?

No, I’m dumb and didn’t realize the rails were in a different place. When I ordered the frame I should have ordered a G45 frame. Doesn’t work so I ordered a Gen 5 G34 barrel so I can use a Gen 4 slide after swapping back plate.

[Lon]

No, I’m dumb and didn’t realize the rails were in a different place. When I ordered the frame I should have ordered a G45 frame. Doesn’t work so I ordered a Gen 5 G34 barrel so I can use a Gen 4 slide after swapping back plate.

Gotcha. Was hopeful you knew something I didn’t. I’d love to be able to make that work.

[JCN]

Gotcha. Was hopeful you knew something I didn’t. I’d love to be able to make that work.

I could make it work by cutting and moving the rails posterior but not worth the cost and hassle, I think.

Still debating whether I should order a G45 frame as well (probably).

[JCN]

https://youtu.be/Jx-R9wpUmLc

With flashlight and heavy mag, I don’t feel like I’m giving up much performance to my normal CO gear.

The pause on entry at the first position was to foot sweep the activator rope (which is why I didn’t enter the position with gun mounted).

[Simong]

Looks like it works.

96715

Got the kit on Monday, installed looks and perform very well.

Thanks again.

Simong.

[Evil_Ed]

I've been sitting and staring at my G19 and my Qube comp for a few weeks now and like everything else, "why did I spend money on this, and what can I do to make it work better" - earlier in the thread I mentioned that it could be pretty unreliable with anything less than full fat 124 or 147gr...almost anything 115gr and some weaker 124s would leave it short cycling pretty consistently. Even lighter 147 loads would leave it hanging, never mind the weak 150gr Syntech loads...anyway, I went back and re-read the thread and found this post - thank you, I've just ordered an NDZ guide rod kit with a 15#, and a 13# to go with it. It would be nice to see if I could get this thing reliable with a comp, since the comp does a pretty good job at what it does. Put reliability back into the mix, and it should be a pleasure to shoot again!



I know some people are hesitant to change recoil spring weights, but if you’re changing the slide velocity you kind of have to unless you want to lose margin of reliability.

Tiny comps don’t do as much so they don’t rob as much margin.

If you want a comp that makes the gun feel softer, then you have to make other things softer to match.

It’s like changing to stickier tires on a car, you often have to change to stiffer springs / shocks if you want to maximize performance and stay within the sweet spot of reliability.

In this case with a G19 type, an NDZ guide rod and spring for $30 is the easy button.

13 pound spring will work great for most combinations (nuclear loads you might go 15).

For weaker ammo or lighter, faster ammo you could go down to 11#.

I’d go with no higher than 13# especially with 115AE.

[JCN]

I've been sitting and staring at my G19 and my Qube comp for a few weeks now and like everything else, "why did I spend money on this, and what can I do to make it work better" - earlier in the thread I mentioned that it could be pretty unreliable with anything less than full fat 124 or 147gr...almost anything 115gr and some weaker 124s would leave it short cycling pretty consistently. Even lighter 147 loads would leave it hanging, never mind the weak 150gr Syntech loads...anyway, I went back and re-read the thread and found this post - thank you, I've just ordered an NDZ guide rod kit with a 15#, and a 13# to go with it. It would be nice to see if I could get this thing reliable with a comp, since the comp does a pretty good job at what it does. Put reliability back into the mix, and it should be a pleasure to shoot again!

You should be good. I’m shooting the 150 Syntech in the video.

With the custom springs, you can even Dremel off a coil or two if you need lighter spring rate.

If you go too far it won’t return to battery reliably but even with Syntech you should have pretty decent margin.

[Lon]

Bought the last Gen4 that Midwest Gun Works had in stock as a bday present to myself. Looking forward to comparing this to my PMM Ultra JTTC.

[JCN]

Bought the last Gen4 that Midwest Gun Works had in stock as a bday present to myself. Looking forward to comparing this to my PMM Ultra JTTC.

Happy Birthday!

I have a Gen 5 PMM JTTC delivering Monday and will compare too!

I kind of think the main difference is how easy it is to take the afterburner off for cleaning.

That’s been a nice feature. It’s much easier to clean.

[JCN]

97400

Gen 3 on left and Gen 5 on right.

[JCN]

Lon I shot the PMM using 9 major ammo today and it did an admirable job.

I expect the afterburner to do just as well.


https://youtu.be/ZZyp38tAMzE

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[Lon]

Lon I shot the PMM using 9 major ammo today and it did an admirable job.

I expect the afterburner to do just as well.


https://youtu.be/ZZyp38tAMzE

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My Afterburner just got here. I’ll open it up after dinner. Looking forward to trying it out.

[Lon]

Lon I shot the PMM using 9 major ammo today and it did an admirable job.

I expect the afterburner to do just as well.


https://youtu.be/ZZyp38tAMzE

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I’ve got the JTTC and the Ultra JTTC dual port. Dual port blows the single port outta the water.

[JCN]

I’ve got the JTTC and the Ultra JTTC dual port. Dual port blows the single port outta the water.

I know. That’s always the slippery slope, right?

Larger, bigger, heavier, bulkier… always shoots better.

It’s all about compromises I guess. Will be interesting to hear how you like the afterburner.

I think it’s one of the best looking comps out there and being able to have a G17 form factor is nice.

[Lon]

I know. That’s always the slippery slope, right?

Larger, bigger, heavier, bulkier… always shoots better.


Not much size difference between the JTTC and the Ultra due to the barrel for the Ultra.

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[JCN]

Not much size difference between the JTTC and the Ultra due to the barrel for the Ultra.

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I was thinking about / using the tiny JTTC (Micro).

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Not the longer JTTC like in your photo, this one (Micro JTTC) is similar to the form factor of an afterburner.

[JCN]

Not much size difference between the JTTC and the Ultra due to the barrel for the Ultra.

I was looking at PMM website today (Black Friday sales) and I don’t think you have a JTTC?

I think you have a standard comp and an ultra?

The JTTC I thought was the “just the tip = JTT” shorty one.

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[Lon]

I was looking at PMM website today (Black Friday sales) and I don’t think you have a JTTC?

I think you have a standard comp and an ultra?

The JTTC I thought was the “just the tip = JTT” shorty one.

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Nope. As I understand it, they’ve got 3 different comps. The JTTC, JTTC Micro and the JTTC Ultra. Their website doesn’t do a good job of clarifying that until you look at the fine print or their videos.

If you look at the comps for other brands (look at Sig), their standard single
Port is the JTTC, etc.

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Got the Radian installed.

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[JCN]

Nope. As I understand it, they’ve got 3 different comps. The JTTC, JTTC Micro and the JTTC Ultra. Their website doesn’t do a good job of clarifying that until you look at the fine print or their videos.

Thanks for the clarification!

I like the radian because the cut barrel and mounting system means the comp can be short but effective. It’s really brilliant. I’ll be keen to hear what you think comparing the Ultra to the radian.

[Lon]

Put a couple hundred rounds down range today. My initial thoughts are that it is ALMOST as good as the Ultra JTTC. Dot tracking was slightly better with the Ultra JTTC. Where the Afterburner does beat the Ultra is the length. It’s much more comfortable to carry the G17 holster than the G34 length needed for the Ultra.

Posted some video on my IG page if you’re interested. Got some comparison video w/ my Ultra.

https://www.instagram.com/p/ClaEoPar7Ju/?igshid=YmMyMTA2M2Y=

[JCN]

Lon nice shooting!

[Lon]

Lon nice shooting!

Thanks!

[HeavyDuty]

I have the sads. I’ve had a Gen5 set on order for four months now…

[Lon]

I have the sads. I’ve had a Gen5 set on order for four months now…

You’ll like it. Shot line in a match last night. https://www.instagram.com/p/CmYD71psdpj/?igshid=YmMyMTA2M2Y=

[HeavyDuty]

You’ll like it. Shot line in a match last night. https://www.instagram.com/p/CmYD71psdpj/?igshid=YmMyMTA2M2Y=

That’s flat!

[Lon]

That’s flat!

Yep. That’s Speer Lawman 124gr.

[HeavyDuty]

Yep. That’s Speer Lawman 124gr.

My preferred range load.

[MountainRaven]

Gen5 barrel/comp is in stock on Radian's website at the time of this posting.

[HeavyDuty]

Gen5 barrel/comp is in stock on Radian's website at the time of this posting.

More than a little pissed about that. It let me put one in my cart, but I couldn’t find the cart button anywhere on the page (iPad with Safari or Chrome) and they went out of stock before I could complete the transaction.

[GJM]

Stuck this in here, for lack of a better place. Today, I was shooting a difficult array with a Mayhem Syndicate comp'd 19 versus another optic equipped 19 with an OEM barrel. The comp took about ten percent off the total time, for equivalent accuracy, meaning 3.00 vs 3.30 runs.

[GearFondler]

Stuck this in here, for lack of a better place. Today, I was shooting a difficult array with a Mayhem Syndicate comp'd 19 versus another optic equipped 19 with an OEM barrel. The comp took about ten percent off the total time, for equivalent accuracy, meaning 3.00 vs 3.30 runs.I assume that less recoil equals faster recovery for quicker splits. I'm curious if you also find the dot easier to track helping your time?

[GJM]

I assume that less recoil equals faster recovery for quicker splits. I'm curious if you also find the dot easier to track helping your time?

The dot is just as easy to track with the OEM barrel. However, the dot moves less with the comp, allowing faster splits.

[GearFondler]

The dot is just as easy to track with the OEM barrel. However, the dot moves less with the comp, allowing faster splits.That makes sense... Thanks!

[JCN]

I assume that less recoil equals faster recovery for quicker splits. I'm curious if you also find the dot easier to track helping your time?


The dot is just as easy to track with the OEM barrel. However, the dot moves less with the comp, allowing faster splits.

I find that the dot is easier to track because the dot moves less because the slide rises less.

It’s like hitting an 80mph pitch rather than a 90mph one.

Your 10% results suggest you’re also finding it easier to track even if you’re not consciously realizing it.

It won’t be quicker splits, necessarily because the recoil spring should be tuned to slow it down further.

That’s really where the beauty of a comp is. It’s like getting a long, heavy slide without a long, heavy slide.

Splits aren’t necessarily faster, but it’s easier to track and time the streak on target.

The caveat is always: what kind of splits are you running.

A tuned comp slide versus stock will still be in the 0.15-0.17 range for both if done right.

If you’re double or triple bouncing it’s not really tracking dot, it’s settling recoil which is a different thing.

[JCN]

GearFondler
GJM

Look at the slide speed and softness of comp versus port versus nothing and imagine how that translates to tracking and mechanics.


https://youtu.be/lF4DYb1iYwo