The breechface groove in Gen5 Glocks

[feudist]

Do those significantly improve ejection?

Would it be worth it to do it to a Gen4?

Or is that PII?

[call_me_ski]

Glocks are commodity guns. You are way over thinking things. Does it improve it? yes. Do the Gen 4 guns work without it? Yes. Just buy a Gen 5 if you want to.

[RJ]

How good/bad is the ejection on your gen 4 now?

[Lost River]

Are you having ejection problems with your g4 now?

If its not broke..

[ralph]

If you want vigorous 100% ejection to the right, so that it throws the cases about 7-8’ away from you, buy a Gen 5, If on the other hand you’re happy with the pistol throwing cases to the right, left, straight up, forward, or over your shoulder, or in your face, then, buy a Gen 3,4,Glock... After having numerous Gen 3, 4, G19’s, G21’s all of which had ejection issues, and only two saw a significant improvement with a Apex extractor, For me, as far as Glocks go, I won’t buy anything but a Gen 5, with the breechface cut..

[GJM]

If you like to shoot in short sleeve shirts, the new breech face cut is desirable.

[HeavyDuty]

I’m actually surprised we haven’t seen smiths offering the breechface cut. In my personal experience guns with the cut significantly outperform the ones I have without. I wonder if the cut would have salvaged my old 36...

[ralph]

I’m actually surprised we haven’t seen smiths offering the breechface cut. In my personal experience guns with the cut significantly outperform the ones I have without. I wonder if the cut would have salvaged my old 36...


Or better yet, Why doesn’t Glock offer this as a retrofit for Gen 3,4,pistols?

[Sig_Fiend]

The breechface cut is a significant improvement for consistency and robustness of both extraction and ejection in Glocks. The thing I think many people don't realize is that Glocks without it (gen 1-4 and early gen 5, for the most part) are always on the ragged edge of barely extracting or ejecting. That's just my opinion. They work and are generally reliable a majority of the time, but that doesn't necessarily mean they are great at performing those two functions of cycle. They can be better. Here's some vids to demonstrate the point:

G19.3: https://www.youtube.com/watch?v=tBHkGaWU1Lg
G34.3: https://www.youtube.com/watch?v=4uotsMABUb4
G17.4: https://www.youtube.com/watch?v=CbgrioNpJSA
G17.4 and G23: https://www.youtube.com/watch?v=IOAtSPHmgwU
G23: https://www.youtube.com/watch?v=QM_30OHgfNA
G19X: https://youtu.be/Alr6mjmzKGs?t=132
G20: https://www.youtube.com/watch?v=ABBfc_uq_Is
Custom G19 (appears to be a gen 4): https://www.youtube.com/watch?v=hkrX6BVO8xc
Suppressed G19.3: https://www.youtube.com/watch?v=klnKLqlq2e8
P80 + RMR + Comp: https://www.youtube.com/watch?v=sWWtQdU1c8Y (I know, far from OEM or stock, but interesting nonetheless)

Some of those may seem irrelevant, but the interesting thing to note is some of the common characteristics across models, calibers, and configurations. For one, the brass appearing to often slam into either the breech face or front of the extractor sideways as it's ejecting. Another variant of that is the brass contacting the right side of the lowered ejection port wall, causing the brass to achieve a significantly vertical arc. Also, pretty frequently you'll see brass just dribbling out of the ejection port as opposed to being flung a fair distance of several feet or more. Generally all things that aren't confidence inspiring.

Contrast that with a well-tuned 1911 extractor and ejector. Here's Hilton Yam with several Staccato 2011's and a G19.5. Notice across all of these, including the G19, the consistency of the pattern or arc of ejection. Personally, THAT is what I want to see from a gun, but I am weird. ;)
https://youtu.be/Rf12GnB27tI?t=422

For improving extraction or ejection on older Glocks a few common options are:

Apex Tactical extractor (https://www.apextactical.com/glock-parts-and-accessories/failure-resistant-extractor)
Glock 30274 ejector (https://www.glockparts.com/custom/GLSP30275.htm) (for 9mm only) (Sometimes you can find the ejector-only on eBay, but generally have to buy a gen 4 trigger housing from most places.)
White Sound Defense H.R.E.D. extractor plunger: 9mm (http://www.whitesounddefense.com/products/H.R.E.D.-9mm.html), .357sig/40sw (http://www.whitesounddefense.com/copy-of-h-r-e-d-357-sig-40-s-w/)
Test with hotter/better quality ammo like: Speer Lawman, Winchester NATO (Q4318 or other brand at proper NATO spec), Federal HST, Speer Gold Dot, anything from Black Hills, etc.

[feudist]

Mine does ok. I'm left handed so from Gen2 on, I've always caught a piece of brass here and there, especially shooting on the move to the right.

I'm deep in Gen1-4 parts and have 2 Gen 4s set up,and as far as I can tell the improved ejection is the only change that affects me.

I took a rasp to the fingergrooves, and undercut the trigger guard, also thinned it where my finger was dragging inside. I painted the inside of the magwell orange

so reloads are easy.

I couldn't shoot a 2" group on demand if Haile Berry was the prize, so the improved barrel means nuts.

I don't know.

[Crow Hunter]

Personally I wouldn't upgrade just for the breech face. If I were going to upgrade, I would want to make sure that I had it but that wouldn't be the primary reason.

That being said, I am NOT a superior shooter, I can impress my friends but probably wouldn't impress anyone here but I have found that the Gen 5 is noticeably more accurate for me and is a noticeably softer shooter and it fits my hand appreciably better compared to the Gen 3 that I used to have.

Initially I did not like it and planned on keeping all Gen 3s but after getting 150 or so rounds on it my groups tightened up noticeably. I now much prefer shooting my Gen 5 to my wife's Gen 3.

I have made a surprising number of "there is no way I could hit that, damn I did" shots in the field that I have missed with the Gen 3.

For whatever reason my tendency to shoot to the left if I didn't mind my grip with Glocks is gone with the Gen 5.

[Shipwreck]

I will say that I REALLY like the Gen 5s. I have owned many Glocks over 25+ years - I have not been a fan in a long time. The Gen 5s brought me back. I have bought 3 in the last 2 months (G19, G34, and I have another G34 that will arrive next week).

[Greg Bell]

I fought this fight FOR YEARS. Only early 00s Gen 3 17s were decent ejectors. I bought SOO MANY Glock 19s only to find out they had ED. When I heard the Gen 5s had the breech face cut (which I am now noticing was already present in some other guns) I was thrilled. I have been through 3 breech face 19s and they all have excellent (HK/Beretta) ejection. I don't know why it took so long, but Bravo Glock. I might even buy into the perfection claim a bit now.



The breechface cut is a significant improvement for consistency and robustness of both extraction and ejection in Glocks. The thing I think many people don't realize is that Glocks without it (gen 1-4 and early gen 5, for the most part) are always on the ragged edge of barely extracting or ejecting. That's just my opinion. They work and are generally reliable a majority of the time, but that doesn't necessarily mean they are great at performing those two functions of cycle. They can be better. Here's some vids to demonstrate the point:

G19.3: https://www.youtube.com/watch?v=tBHkGaWU1Lg
G34.3: https://www.youtube.com/watch?v=4uotsMABUb4
G17.4: https://www.youtube.com/watch?v=CbgrioNpJSA
G17.4 and G23: https://www.youtube.com/watch?v=IOAtSPHmgwU
G23: https://www.youtube.com/watch?v=QM_30OHgfNA
G19X: https://youtu.be/Alr6mjmzKGs?t=132
G20: https://www.youtube.com/watch?v=ABBfc_uq_Is
Custom G19 (appears to be a gen 4): https://www.youtube.com/watch?v=hkrX6BVO8xc
Suppressed G19.3: https://www.youtube.com/watch?v=klnKLqlq2e8
P80 + RMR + Comp: https://www.youtube.com/watch?v=sWWtQdU1c8Y (I know, far from OEM or stock, but interesting nonetheless)

Some of those may seem irrelevant, but the interesting thing to note is some of the common characteristics across models, calibers, and configurations. For one, the brass appearing to often slam into either the breech face or front of the extractor sideways as it's ejecting. Another variant of that is the brass contacting the right side of the lowered ejection port wall, causing the brass to achieve a significantly vertical arc. Also, pretty frequently you'll see brass just dribbling out of the ejection port as opposed to being flung a fair distance of several feet or more. Generally all things that aren't confidence inspiring.

Contrast that with a well-tuned 1911 extractor and ejector. Here's Hilton Yam with several Staccato 2011's and a G19.5. Notice across all of these, including the G19, the consistency of the pattern or arc of ejection. Personally, THAT is what I want to see from a gun, but I am weird. ;)
https://youtu.be/Rf12GnB27tI?t=422

For improving extraction or ejection on older Glocks a few common options are:

Apex Tactical extractor (https://www.apextactical.com/glock-parts-and-accessories/failure-resistant-extractor)
Glock 30274 ejector (https://www.glockparts.com/custom/GLSP30275.htm) (for 9mm only) (Sometimes you can find the ejector-only on eBay, but generally have to buy a gen 4 trigger housing from most places.)
White Sound Defense H.R.E.D. extractor plunger: 9mm (http://www.whitesounddefense.com/products/H.R.E.D.-9mm.html), .357sig/40sw (http://www.whitesounddefense.com/copy-of-h-r-e-d-357-sig-40-s-w/)
Test with hotter/better quality ammo like: Speer Lawman, Winchester NATO (Q4318 or other brand at proper NATO spec), Federal HST, Speer Gold Dot, anything from Black Hills, etc.

[HeavyDuty]

So... is it worth adding the cut to older guns?

[GJM]

So... is it worth adding the cut to older guns?

Is anyone offering this mod?

My Gen 5 pistols with this throw the brass out more vigorously than my VP9 pistols.

[HeavyDuty]

Is anyone offering this mod?

My Gen 5 pistols with this throw the brass out more vigorously than my VP9 pistols.

Not that I’ve noticed, but I wouldn’t be surprised if someone does. Dremel time!

[Clark Jackson]

I don't think it's worth buying a Gen5 just for the breech face cut. Maybe for the barrel and grip.

As an aside, I must own or have owned the most one-off Gen3 and Gen4 guns ever (G26 x1, G19s x3, G17s x4, and G34s x2) because I've yet to experience the ejection/extractions issues described. I've even had a Gen4 G23 and G22 (with weapon mounted lights) that didn't have the infamous issues.

Admittedly, I've only put a few thousand rounds through a G23/22 vs the thousands (10s of thousands maybe?) I've put through the G4 9mm family with just the normal primary malfunctions (FTE) related to an old magazine or the random bad round. My Gen4 Glocks are so reliable I even shoot them in short sleeves. :) I've seen many more issues and exaggerated extraction/ejection with my P320s than with my Glocks.

In all seriousness, I'm not debating that people have these issues with Glocks, but I can't rectify my personal experiences with those of others. This leads me to ask how I could have such good luck with Gen4s across multiple years, states, and vendors.

FWIW, I'm not a huge fan of the Gen5 Glocks. I like the barrel and front strap. Not a fan of the slide releases. If what you have is working, the "upgrade" isn't really an upgrade, IMO.

That being said, if carrying a Gen5 gives you peace of mind... why not get one? :)

[GJM]

There is a difference between a pistol being reliable and a pistol functioning but sprinkling brass in such a way it is crashing into the front of your optic and dribbling down your arms.

[Erick Gelhaus]

Well, I've got a Gen 5 sitting in waiting period jail so I'll see what this is all about at some point.

In the meantime, why are there five generations of perfection? Hmmm

(no, really, I don't expect an answer. It's just humor)

[JohnO]

Gen 5 G17 ejection visible here (on my laptop I can see it fine, on a phone??). 115 gn range ammo.


https://youtu.be/a_bXhwbGmWQ

[Savage Hands]

IMO, the current Gen 5’s are well worth the upgrade over the previous generations if you have the means to do so for many reasons listed above (trigger, ejection/extraction, consistency of precision, ergonomics)

[echo5charlie]

Or better yet, Why doesn’t Glock offer this as a retrofit for Gen 3,4,pistols?

The recent batch of G43s I received have the cut as well as the recessed crown. I know the Vickers G43s had the cut, never checked the crown on them though.

[DDTSGM]

Admittedly, I've only put a few thousand rounds through a G23/22 vs the thousands (10s of thousands maybe?) I've put through the G4 9mm family with just the normal primary malfunctions (FTE) related to an old magazine or the random bad round. My Gen4 Glocks are so reliable I even shoot them in short sleeves. :) I've seen many more issues and exaggerated extraction/ejection with my P320s than with my Glocks.

In all seriousness, I'm not debating that people have these issues with Glocks, but I can't rectify my personal experiences with those of others. This leads me to ask how I could have such good luck with Gen4s across multiple years, states, and vendors.

That being said, if carrying a Gen5 gives you peace of mind... why not get one? :)

I've been getting slammed for saying the same thing for years. Probably well over 65% of the 300 or so officers we saw each year were carrying Glocks. Until I read it on the internet I didn't know that Glock BTF was a thing except for the occasional problem shooter. We generally corrected those problems by working with their grip. I'm not saying a Glock doesn't eject one into the forehead or face on occasion, just that I've never seen it as a Glock specific problem.

In mulling this over, I've considered that perhaps it was because during the Gen 1, 2, and 3 days we were shooting 147gr equivalent of the Federal HydraShok round, but a year or so before I retired we switch to 124gr and that didn't seem to cause the BTF problems.

I'm wondering if there is any relationship to cadence/rate of fire?

[HCM]

I've been getting slammed for saying the same thing for years. Probably well over 65% of the 300 or so officers we saw each year were carrying Glocks. Until I read it on the internet I didn't know that Glock BTF was a thing except for the occasional problem shooter. We generally corrected those problems by working with their grip. I'm not saying a Glock doesn't eject one into the forehead or face on occasion, just that I've never seen it as a Glock specific problem.

In mulling this over, I've considered that perhaps it was because during the Gen 1, 2, and 3 days we were shooting 147gr equivalent of the Federal HydraShok round, but a year or so before I retired we switch to 124gr and that didn't seem to cause the BTF problems.

I'm wondering if there is any relationship to cadence/rate of fire?

Glock ejection was always marginal but BTF did not really become a thing until the late gen 3/early Gen4 guns. It generally corresponded to the switch to the LCI or "dip" extractors and a corresponding change in small parts suppliers.

Changes to the ejector (336 to 30274) and improved QC on the LCI extractors generally addressed it but Glock ejection was never great (until the latest gen5) so it became "lore."

[LockedBreech]

Glocks are commodity guns. You are way over thinking things. Does it improve it? yes. Do the Gen 4 guns work without it? Yes. Just buy a Gen 5 if you want to.

This. My work gun is a Gen 5 Glock 19. My home defense gun is a Gen 4 Glock 17. I have no intention of replacing the Gen 4 in the home defense role even though I also have a Gen 5 17 MOS. It works just fine.

[JBP55]

The recent batch of G43s I received have the cut as well as the recessed crown. I know the Vickers G43s had the cut, never checked the crown on them though.

Same on my latest G43X Serial number starts with BPHR.

[RJ]

If anyone else can't remember what the cut look like (I couldn't), there's a decent picture of the breech face cut buried in the yuge Glock Gen 5 thread, dated October 2018:

https://pistol-forum.com/showthread.php?27410-*THE*-Gen-5-Glock-thread-First-Impressions-Reviews-and-Thoughts&p=805188&viewfull=1#post805188

[Whirlwind06]

Interesting that such a small change has such an impact on performance. Any information on why? Does it cam the case back a bit so the ejector can fling the case further?


Sent from my iPhone using Tapatalk

[g45c]

Been carrying and shooting nothing but Glocks for over 10 years and never had the ejection issue. I would love to have one to play with to see what I could do to solve the problem so if anyone has a 9mm you want to sell cheap:rolleyes:, PM me, I'll be happy to take it off your hands.

NRA Life Member / Basic Pistol instructor / RSO…Glock/ M&P Certified armorer

"Under pressure, you don't rise to the occasion, you sink to the level of your training. That's why we train so hard"
Unnamed Navy Seal

[Jim Watson]

Interesting that such a small change has such an impact on performance. Any information on why? Does it cam the case back a bit so the ejector can fling the case further?


What I was going to ask, what does it DO? On the ejector side, so the instant the case touches the ejector, it is going to be moving off of the groove, pivoting under the extractor.

[Jason M]

Interesting that such a small change has such an impact on performance. Any information on why? Does it cam the case back a bit so the ejector can fling the case further?


Sent from my iPhone using Tapatalk

The cut makes it more likely than not that the extractor will hold on to the empty, during the entire rearward travel of the slide, until the empty is acted upon by the ejector. Before the cut, the extractor tended to let go of the case early. This sometimes meant that the top round in the magazine became the "ejector by default" and flight path of the empty case was erratic. The important part of this isn't neat little brass piles. The important part is that now the gun is now more likely to consistently complete the "extract-eject-feed-chamber-lock" portion of its operation cycle correctly.

[echo5charlie]

Recent G19 Gen3s do not have the cut, but now have the etched slide and barrel marking (ala Gen5) versus the stamped style.

Recent G19Xs do not have the cut

[echo5charlie]

Same on my latest G43X Serial number starts with BPHR.

All G43Xs should have the cut

[JBP55]

All G43Xs should have the cut

All Glocks should have the cut but all do not.

[pangloss]

All Glocks should have the cut but all do not.Including the new Gen1 retro pistols. If they were going to ditch the 90 degree extractor they should have done the job right and added the breech face cut.

Sent from my moto e5 cruise using Tapatalk

[GearFondler]

Including the new Gen1 retro pistols. If they were going to ditch the 90 degree extractor they should have done the job right and added the breech face cut.

Sent from my moto e5 cruise using TapatalkBut would it really be a retro Glock without BTF?

[JBP55]

But would it really be a retro Glock without BTF?

I have owned many but never had one of those.

[Chomps]

ok,... glad I read this thread.

I was seeing this a LOT with the Hellcat, and I definitely got a few BTF's (see,..! Learning vocabulary!!) ;) :D ...Along with shoulder, hat, forearm etc. with my NEW Glock 19 Gen5 yesterday!

Since the consensus seems to be this issue /w the weapon has been fixed in the Gen5's? As a new shooter, without any formal training, I can probably safely assume it's "Me that sucks & NOT the gun, right?" LoL ;)

So if I want to diagnose and subsequently fix this,.. what part of my grip or technique would be the cause for this type behavior from the spent brass? I'm ?reasonably? sure I'm not "limp wristing". But without video confirmation or reliable, professional observation? I can't be 100% certain.

If someone could outline a short technique/form fix for this,.. I'll see if I can bring that into play next time I'm @ the range! Thnx!!!



_edit_
BTW,... before I get pounced on,... Now that I have a reliable weapon, I DO plan to get some training and sign up for a few classes. (...Just need the CC to cool from "White hot," to cherry red first tho!) haha!

[RJ]

Since the consensus seems to be this issue /w the weapon has been fixed in the Gen5's? As a new shooter, without any formal training, I can probably safely assume it's "Me that sucks & NOT the gun, right?" LoL ;)

So if I want to diagnose and subsequently fix this,.. what part of my grip or technique would be the cause for this type behavior from the spent brass? I'm ?reasonably? sure I'm not "limp wristing". But without video confirmation or reliable, professional observation? I can't be 100% certain.



Yes, I would say a Gen 5 should eject strongly. Of course all things are possible. There's an updated ejector fitted to the new pattern Trigger Mechanism Housing which I put in my early production 2017 G19 Gen 5 in December 2018. I still get BTF occasionally, but I would not say it's causing me any heartburn, since I'm generally trying to get through a stage as fast a possible and consequently I'm in headless chicken mode when shooting. Here's the part number of the TMH and ejector I installed in mine: Trigger Mechanism Housing with Ejector 47208 (with the 47021 Ejector). I don't know if there is a later ejector; HCM might off the top of his head.

As to your specific case, it's tough to say without looking at you shooting your G19, and the ejection pattern. With a newish Gen 5 purchase, ejection "should" be strong and to the right, I would have thought. Have you looked specifically at a group of fired rounds and where they go? Looking at the groups you posted in your other thread, it seems hard to believe you are limp-wristing the pistol. They are generally nice and centered. The only thing I can suggest is to "grip hard".

One last thought, check the underside of the extractor claw to make sure there's no gunk under there; the claw grips the case rear and pulls it out of the chamber towards the ejector. It's easy enough to shine a flashlight on it after a basic field strip. Pretty unlikely with a new gun but you never know.

Ah, one more thing: The extractor should be being pressed inward by the Extractor Depressor Plunger; I guess it's possible that there's a fault with the EDP spring, meaning it's not pressing in hard enough on the extractor claw. You'd need to slip off the rear slide cover and slide it out to check the EDP; but if you aren't comfortable doing that, maybe get an armourer to help (I'm not one). But that seems kinda unlikely; just spit balling here.

FWIW, here's a decent video on how the parts of a Glock work:


https://youtu.be/V2RDitgCaD0

[HeavyDuty]

ok,... glad I read this thread.

I was seeing this a LOT with the Hellcat, and I definitely got a few BTF's (see,..! Learning vocabulary!!) ;) :D ...Along with shoulder, hat, forearm etc. with my NEW Glock 19 Gen5 yesterday!

Since the consensus seems to be this issue /w the weapon has been fixed in the Gen5's? As a new shooter, without any formal training, I can probably safely assume it's "Me that sucks & NOT the gun, right?" LoL ;)

So if I want to diagnose and subsequently fix this,.. what part of my grip or technique would be the cause for this type behavior from the spent brass? I'm ?reasonably? sure I'm not "limp wristing". But without video confirmation or reliable, professional observation? I can't be 100% certain.

If someone could outline a short technique/form fix for this,.. I'll see if I can bring that into play next time I'm @ the range! Thnx!!!



_edit_
BTW,... before I get pounced on,... Now that I have a reliable weapon, I DO plan to get some training and sign up for a few classes. (...Just need the CC to cool from "White hot," to cherry red first tho!) haha!

Question - the 19 Gen5 has gone through a few changes. Is there a cutout in the bottom of the front of the grip right above the magwell? Does it have forward serrations on the sides of the slide? I’m not sure if there are any part changes from the early to current 19.5s, but knowing what you have might help. (Edit - I see RJ already covered the parts question above.)

Also, weaker range ammunition might eject a little erratically - that’s my experience.

[Chomps]

Question - the 19 Gen5 has gone through a few changes. Is there a cutout in the bottom of the front of the grip right above the magwell? Does it have forward serrations on the sides of the slide? I’m not sure if there are any part changes from the early to current 19.5s, but knowing what you have might help. (Edit - I see RJ already covered the parts question above.)

Also, weaker range ammunition might eject a little erratically - that’s my experience.

No cutout that I can tell. But it does have forward serration on the slide.
I was using all sorts of ammo. From 115gr fmj up to 147gr Hp.

Im certainly not a trained shooter. So even tho I can manage a pretty decent grouping from one clip,.. I can then be all OVER the place with the next. LoL! So flawed technique is certainly not out of the question as a contributing factor. 😉

61299
61300

[HCM]

No cutout that I can tell. But it does have forward serration on the slide.
I was using all sorts of ammo. From 115gr fmj up to 147gr Hp.

Im certainly not a trained shooter. So even tho I can manage a pretty decent grouping from one clip,.. I can then be all OVER the place with the next. LoL! So flawed technique is certainly not out of the question as a contributing factor. 😉

61299
61300

Your gun should have the breechface cut.

Hand guns in general and Glocks in particular are sensitive to variations in grip.

[Chomps]

Your gun should have the breechface cut.

Hand guns in general and Glocks in particular are sensitive to variations in grip.

HCM So then,.. apparently there are more than One version of a Gen5 Glock 19?

Well That's confusing!! 😳🤷*♂️😂

[RJ]

HCM So then,.. apparently there are more than One version of a Gen5 Glock 19?

Well That's confusing!! 😳🤷*♂️😂

Yep. Well, maybe it's more accurate to say there has been some "evolution" of the G5 G19s. HCM would probably know more. My early-production 2017 looks like your first picture. Mismatched pig-nose dustcover on the front, below the slide, and all.

I don't have an issue with the grip cutout due to my size M office worker hands. It drives others nuts.

The front slide serrations is for grip (obviously) but I am not high speed low drag enough to use them (if they are a HSLD option, I don't know.)

[RJ]

All G43Xs should have the cut

My G48 s/n BPZnnnn purchased Sep 20 has the cut. I finally got a chance to take a picture:

61306

[HCM]

HCM So then,.. apparently there are more than One version of a Gen5 Glock 19?

Well That's confusing!! 😳🤷*♂️😂

Inline changes as detailed by RJ. Yours will be the configuration of all G19.5’s going forward.

Not uncommon. Sometimes inline changes Are introduced when it is necessary to replace molds or other production tooling.

The front cut out was a feature on Gen 1, 2, and early Gen 3 guns. The FBI requested it’s return on the 19M. The purpose is to allow magazines to be more easily stripped out one handed in an emergency. Some people don’t like them - they Don’t bother me. Glock is addressing those issue via mag base plates with an extended lip on the front instead.