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Thread: The breechface groove in Gen5 Glocks

  1. #11
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    Jun 2012
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    West TN
    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.

  2. #12
    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).

  3. #13
    Member
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    Feb 2011
    Location
    Earth
    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.


    Quote Originally Posted by Sig_Fiend View Post
    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
    • Glock 30274 ejector (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, .357sig/40sw
    • 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.

  4. #14
    Site Supporter HeavyDuty's Avatar
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    So... is it worth adding the cut to older guns?
    Ken

    BBI: ...”you better not forget the safe word because shit's about to get weird”...
    revchuck38: ...”mo' ammo is mo' betta' unless you're swimming or on fire.”

  5. #15
    Quote Originally Posted by HeavyDuty View Post
    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.
    Likes pretty much everything in every caliber.

  6. #16
    Site Supporter HeavyDuty's Avatar
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    Quote Originally Posted by GJM View Post
    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!
    Ken

    BBI: ...”you better not forget the safe word because shit's about to get weird”...
    revchuck38: ...”mo' ammo is mo' betta' unless you're swimming or on fire.”

  7. #17
    Site Supporter Clark Jackson's Avatar
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    Sep 2018
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    USA
    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?
    Last edited by Clark Jackson; 09-25-2020 at 09:26 PM.
    "True heroism is remarkably sober, very undramatic. It is not the urge to surpass all others at whatever cost, but the urge to serve others at whatever cost." -Arthur Ashe

  8. #18
    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.
    Likes pretty much everything in every caliber.

  9. #19
    Site Supporter Erick Gelhaus's Avatar
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    Jun 2011
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    The Wasatch Front
    Well, I've got a Gen 5 sitting in waiting period jail so I'll see what this is all about at some point.

    [snark] In the meantime, why are there five generations of perfection? Hmmm [/snark]

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

  10. #20
    Site Supporter JohnO's Avatar
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    Sep 2011
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    CT (behind Enemy lines)
    Gen 5 G17 ejection visible here (on my laptop I can see it fine, on a phone??). 115 gn range ammo.


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