JCN likes compensators

[JCN]

Since starting in Open, I’ve been experimenting with compensators.

Drilling side holes and changing comps.


https://youtu.be/T0z-tzs55Nw


https://youtu.be/OWFOw5NXBSI

And playing around with versions of my carry gun:

81222

I’m starting to get a better understanding of how different comp weights and patterns contribute to recoil feel and sight tracking.

81223

Even with weak 9mm it does make a noticeable difference. It’s subtle but it’s there.

I have a ported barrel P365SAS as well.

One thing that I do notice is that in general I do prefer frame mounted or semi-captured comps.

So going to revisit one of the previous comps I bought.

The Dark Hour standoff comp.

I initially bought it for a 357 Sig G32… but it mounts via the polymer rail and with 357 Sig rapid fire it launched itself off the front after galling the rail notch.

I think it’ll work better with 9mm and won’t have any porpoising like tilting barrel uncaptured comps.

Thinking about this kind of setup for nightstand.

81224

Would probably put the factory MR920 slide back on with the new RMSx and co-witnessed night sights. GJM YVK

Best as I can describe it, a good comp makes ammo feel like one power level down.

9 major feels like hot 9mm, hot 9mm feels like gamer ammo and gamer ammo in a micro gun feels like gamer ammo in a larger gun.

Recently I shot my Alien back to back with a comp P365 and the P365 was softer and easier to shoot if you believe that!

[YVK]

I still haven't gotten one. I have a tab with PMM 365 comp page open pretty much all the time but they are out of stock, but deep inside I am still somewhat reluctant. I barely work with my p365MS but I got to a 2.4 sec failure drill from concealment last weekend, and shooting wasn't really where time was lost.
I would've had much easier time deciding if them comps had a quick attachment/detachment options like Mayhem's product.

[Clusterfrack]

I’m trying to locate the video of SouthNarc testing thumb-pec shooting with compensated pistols…

[JCN]

I’m trying to locate the video of SouthNarc testing thumb-pec shooting with compensated pistols…

Here’s one of someone else:

https://youtu.be/ApU_uuzdJY4

But from that kind of position, would it be much different than cylinder gap on a 357 snub?

81233

Everything is trade off.

For me, it makes a small gun shoot like a bigger gun and that’s worth something.

[GearFondler]

Here’s one of someone else:

https://youtu.be/ApU_uuzdJY4

But from that kind of position, would it be much different than cylinder gap on a 357 snub?

81233

Everything is trade off.

For me, it makes a small gun shoot like a bigger gun and that’s worth something.Speaking from my ass, I'd say yes, comps are probably safer from retention than a cylinder gap, simply because there is less pressure involved and less chance of launching particles but a comp may launch the pressure more directly towards the face than a cylinder gap would. You can usually feel the pressure wave from the Comp hit your face while I don't believe that happens with most cylinder gaps (but I'm not entirely certain about that).

[jh9]

Speaking from my ass, I'd say yes, comps are probably safer from retention than a cylinder gap, simply because there is less pressure involved and less chance of launching particles but a comp may launch the pressure more directly towards the face than a cylinder gap would. You can usually feel the pressure wave from the Comp hit your face while I don't believe that happens with most cylinder gaps (but I'm not entirely certain about that).

Along that train of thought... Somewhere here is a post from nyeti about the "powerport" setup S&W put on some of their revolvers. I think the gist was that it wasn't a problem even from retention.

I believe the punchline to the above was that the port on the powerport barrels was pretty big. Which probably translates to "bleeds pressure much faster, over a wider (probably omnidirectional) area" which translates to less debris being blow in you face. That does, of course, reduce the effectiveness of the comp. But for outside-the-game comps-on-actual-carryguns that sort of thing is probably worth exploring.

Having minimal experience with comps... would I even try firing from retention with a .357 586 L-comp? Sure. Would I do the same with a 6-port 2011 gamer setup with similar ammo (125gr/1450fps)? No.

Maybe that frames the discussion. Comps aren't comps. The single port setups on something the size of a sig 365 interest me as a possible way to get the recoil of these small 9mms down to something Glock 42-ish maybe. I would be skittish about using smaller ported, multi-port units, even if they are more effective.

[JCN]

GearFondler

I think it’s going to depend on the ammo and the type of retention.

Thumb-pec like Clusterfrack suggested would be obnoxious with 357 magnum from a short barrel. Especially if you had the barrel tilted upwards.


jh9

Yes to that end I think it’s good to consider how much unburnt powder and gas is in your cartridge at the muzzle.

Barrel length, caliber and load will dictate how much poof comes out.

Shooting weak 9mm ammo with a huge comp…. Won’t do as much.

[GearFondler]

GearFondler

I think it’s going to depend on the ammo and the type of retention.

Thumb-pec like Clusterfrack suggested would be obnoxious with 357 magnum from a short barrel. Especially if you had the barrel tilted upwards.


jh9

Yes to that end I think it’s good to consider how much unburnt powder and gas is in your cartridge at the muzzle.

Barrel length, caliber and load will dictate how much poof comes out.

Shooting weak 9mm ammo with a huge comp…. Won’t do as much.Yep, with so many variables it's probably best to test your shit vs relying on others experiences.
Use goggles to be best prepared as the angles involved could have debris get past glasses.
I know my Roland with the KKM Comp and 124+P HST produces a pressure wave that will surprise you if you haven't experienced it before but I wasn't hit with anything that I could feel... I'm not sure I would even register it in a fight.

[JCN]

GearFondler

I was thinking more like gelatin and paper towels for testing. Not going to use my own face lol.

[Norville]

Here’s one of someone else:


But from that kind of position, would it be much different than cylinder gap on a 357 snub?


Everything is trade off.

For me, it makes a small gun shoot like a bigger gun and that’s worth something.

I attended the Revolver Roundup at Gunsite last month at and took a class w Greg Ellifritz that addressed this. Basically, the flagged thumb Southnarc pec index needs to be modified for a revolver. I had my 19 Carry Comp with me but shot a 4” M12 for this block of instruction. How’s that for confounding variables, cylinder gap and comp :D

[JCN]

Speaking from my ass, I'd say yes, comps are probably safer from retention than a cylinder gap, simply because there is less pressure involved and less chance of launching particles but a comp may launch the pressure more directly towards the face than a cylinder gap would. You can usually feel the pressure wave from the Comp hit your face while I don't believe that happens with most cylinder gaps (but I'm not entirely certain about that).

I am always reminded of the cylinder gap test Mythbusters did.

Jerry did it with a hot dog too.


https://youtu.be/t6vMkk8VYzc

Relevant screen cap:

81248

Clusterfrack

Like Norville said, might need modification with revolvers and comps.

[314159]

Dear Norville, How did Mr. Ellfritz recommend modifying the thumb flagged pec grip? I think it seems obvious but, I'm often wrong... Thanks for any enlightenment.

[wmu12071]

I feel like the ultimate would be a Laugo Alien type gun for the red dot mount with a chamber cut at the end of the barrel like a comp.

Seeing the other things you have done how have you not cut a port into a revolver barrel or a chunk port into a barrel and slide yet?

[Norville]

Dear Norville, How did Mr. Ellfritz recommend modifying the thumb flagged pec grip? I think it seems obvious but, I'm often wrong... Thanks for any enlightenment.

He went through it in typical Greg logical fashion, but basically it’s a “knuckles to rib cage” index that pushes the revolver forward. Some people used the wrist against the ribs as well. Depends on your build and the size of the gun. Keep it vertical.

We had some scorched shirts but no other issues.

[D-der]

Since starting in Open, I’ve been experimenting with compensators.

Drilling side holes and changing comps.


https://youtu.be/T0z-tzs55Nw


https://youtu.be/OWFOw5NXBSI

And playing around with versions of my carry gun:

81222

I’m starting to get a better understanding of how different comp weights and patterns contribute to recoil feel and sight tracking.

81223

Even with weak 9mm it does make a noticeable difference. It’s subtle but it’s there.

I have a ported barrel P365SAS as well.

One thing that I do notice is that in general I do prefer frame mounted or semi-captured comps.

So going to revisit one of the previous comps I bought.

The Dark Hour standoff comp.

I initially bought it for a 357 Sig G32… but it mounts via the polymer rail and with 357 Sig rapid fire it launched itself off the front after galling the rail notch.

I think it’ll work better with 9mm and won’t have any porpoising like tilting barrel uncaptured comps.

Thinking about this kind of setup for nightstand.

81224

Would probably put the factory MR920 slide back on with the new RMSx and co-witnessed night sights. GJM YVK

Best as I can describe it, a good comp makes ammo feel like one power level down.

9 major feels like hot 9mm, hot 9mm feels like gamer ammo and gamer ammo in a micro gun feels like gamer ammo in a larger gun.

Recently I shot my Alien back to back with a comp P365 and the P365 was softer and easier to shoot if you believe that!

If memory serves me, you were running a True Precision barrel with a Griffin micro comp...
Any input on that set up would be much appreciated!
Would seem, a little additional velocity, a little improvement in accuracy and decrease in recoil with no worry about different recoil springs, reliability etc would be worth consideration.

[JCN]

If memory serves me, you were running a True Precision barrel with a Griffin micro comp...
Any input on that set up would be much appreciated!
Would seem, a little additional velocity, a little improvement in accuracy and decrease in recoil with no worry about different recoil springs, reliability etc would be worth consideration.

I didn’t spend much time with that combination but I liked the True barrel. It’s about the same length as the XL barrel and the accuracy is better. I was able to do the “no fail” drill with that barrel.

81289

81288

The Griffen comp is pretty subtle. It’s probably more of a mild muzzle brake rather than a comp per se as it’s not directional. I think if it like a replacement for a threaded end cap that might do a little something but it’s not on the same scale as something with up ports. It’s not bad and I think it does a little something. But it’s pretty subtle. I like the barrel though.

[Archer1440]

I re-learned close quarters shooting from Larry Mudgett in the summer of 2020, and ran all the drills with a comped (PMM compensator) VP9 and NATO spec 124 ball, as well as my +P HST 124 and 147 carry loads. Zero issues. Some comps are less directional, but the PMM puts everything out the top, and that isn’t pointed anywhere toward you when you’re doing it right, even from awkward positions.

[JCN]

I re-learned close quarters shooting from Larry Mudgett in the summer of 2020, and ran all the drills with a comped (PMM compensator) VP9 and NATO spec 124 ball, as well as my +P HST 124 and 147 carry loads. Zero issues. Some comps are less directional, but the PMM puts everything out the top, and that isn’t pointed anywhere toward you when you’re doing it right, even from awkward positions.

Nice feedback! Thanks for sharing!

Clusterfrack I got a nice cylinder gap powder burn on my weak hand first finger yesterday lol.

[Archer1440]

It might be interesting to visually compare:

VP9L (5” HK barrel, no comp or ports) vs PMM comp on VP9 (4.5” HK threaded barrel). Same 124 grain NATO spec ammo in both photos. Felt recoil (measured with a wrist-mounted accelerometer) is similar between the two, but the comped pistol tracks flatter.

(As an aside, an Apple Watch with appropriate software app makes a pretty good rig for getting meaningful and comparable measurements on these things- comps, ammo, spring rates and mass all show repeatable differences that can be quantified and analyzed in three axes- and I think perhaps with more value than a gun mounted device like a Mantis, since it’s measuring the interaction of pistol/ammo variables and the shooter.)

[professor]

(As an aside, an Apple Watch with appropriate software app makes a pretty good rig for getting meaningful and comparable measurements on these things- comps, ammo, spring rates and mass all show repeatable differences that can be quantified and analyzed in three axes- and I think perhaps with more value than a gun mounted device like a Mantis, since it’s measuring the interaction of pistol/ammo variables and the shooter.)

What App.

[Archer1440]

What App.

https://apps.apple.com/us/app/sensorlog/id388014573
https://apps.apple.com/us/app/watchforce/id1422084433

Both have their uses, depending on how you want to export and use the data.

[JHC]

Looked for somewhere to put this. And the first place I found ie comps.
Comped Staccato

https://www.instagram.com/tv/CXcBV_MgNW5/?utm_medium=copy_link