G43 FTF- thumb on slide stop lever?
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  1. #1
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    G43 FTF- thumb on slide stop lever?

    I love my G43 and I am accurate with it. However, more than any other Glock I've owned or own, I've experienced quite a few FTF and FTE. A failure to feed or eject is an extremely rare occurrence in my experience on any of the larger framed Glocks. I know the issue with limp wristing and I'm positive I'm not doing it; if anything I'm overcompensating by death-gripping.

    Consequently, I'm grasping at straws as to what could be causing so many FTF and FTE (some stovepipes but mostly jams). Today alone, out of 50 rounds with the G43, I experienced 7 FTF and 2 FTE. I used Federal and Blazer 115 gr, (range ammo) and Hornady Critical Duty 135 gr. +P. The FTF and FTE came on different rounds of each magazine, usually on the 3rd or 4th round. I used two factory 6 round mags and one with a +2 mag extension (factory spring)- each was involved in the failures.

    Barring a mechanical issue with the gun, I must be doing something wrong in my grip. In practicing holding the G43 tonight, I found that my shooting hand thumb rests on the slide stop lever as it does on my larger Glocks, but perhaps more fully covering the lever on the G43. Is it possible that I'm impeding the slide during its cycle after the shot? Could I be gripping too hard and thereby slowing down or interrupting the slide cycle?

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    Something I learned shooting the smaller framed pistols is not to allow my thumb to interfere with the slide action.

    Interfering with the slide action causes the symptoms you mentioned and same as what I experienced with my G26. It was the first sub frame pistol I had shot, and I think I was interfering with the slide action due to my grip; I was finding my way with a smaller hand grip than what I was used too. And I had a death grip on it too.

    I added extensions to all the mags and fixed that. So, be very cognazant of your grip and not interfere with the slide action. You said your not L.wristing. Give that a try.

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    Quote Originally Posted by tim414 View Post
    Something I learned shooting the smaller framed pistols is not to allow my thumb to interfere with the slide action.

    Interfering with the slide action causes the symptoms you mentioned and same as what I experienced with my G26. It was the first sub frame pistol I had shot, and I think I was interfering with the slide action due to my grip; I was finding my way with a smaller hand grip than what I was used too. And I had a death grip on it too.

    I added extensions to all the mags and fixed that. So, be very cognazant of your grip and not interfere with the slide action. You said your not L.wristing. Give that a try.
    Thank you Tim- I think this very well may be the case for me too. I really love the grip ergonomics on the G43 and even though "a Glock is a Glock is a Glock," the smaller frame 43 is a different animal than its bigger siblings. I will practice tomorrow with a modified grip.

    Are your mag extensions just extensions or are they +1 or +2? I ask because I'm concerned that if I'm in any way impeding the slide action, then my +2 may affect the spring tension/timing, contributing to the FTF.

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    Nope, the springs tolerate the extensions well. In my experience anyway. I use Pearce grips +2 extensions, but usually only load 11/rds rather than twelve. I have six mags set up like that, but, in terms of G26, it accepts the G19/G17 mags as well. So, I decided that my back-up mags for G26 will all be G19 (15/rd) mags. I also have some G17 mags, and have bought extensions for a few of them to see how I like it.

    So now I have five extra mags for G26. In your case, you only have single stack. I have read on other forums that the extensions for G43 work well. These are Pearce extensions I refer to. I do not own a G43; so, that's what I read on other forums. I might give one a try,


    The extension is what made the G26 perfect for me. I really like that pistol.
    Last edited by tim414; 11-10-2015 at 11:00 PM.

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    Don't forget that the additional length on the spring for adding a +2 on a double stack is less than the additional length of a +2 on a single stack. I wouldn't expect it to be enough to matter, but this is the second discussion of feeding issues with a +2 although it appears to OP is having issues with all magazines.

    Have you run more than 200rds through it? New Glocks with odd problems have a habit of curing themselves around 200 rounds.

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    Quote Originally Posted by MtStream View Post

    Have you run more than 200rds through it? New Glocks with odd problems have a habit of curing themselves around 200 rounds.
    Hey, I like that observation. My thoughts are that, within 200-rds-or-so, that adjustable nut behind the trigger gets adjusted.

    I don't use a "death grip" with my Glocks, or with any other pistols. Make sure that neither your wrists OR your elbows are acting like shock absorbers. I have a feeling that the new G43 will get "broken in" soon enough.

    Could be that the OP needs to have his thumbs trimmed back a few mm.

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    I don't have a 43 yet but I've shot one a few times. The first time my thumb actuated the slide stop but after making a mental note and moving my thumb a bitń no more slide lock.

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    Thank you for all the replies. I've put at least 500 rounds through my G43.

    I went back to the range today and had two other people shoot my G43, including a Glock armorer. No issues.

    I then shot, this time with a less than vice-like grip, and repositioned my right thumb slightly lower, below the slide stop lever. No issues. I think in my earnest to grip the gun solidly (to avoid limp wristing), I was at times pushing upon on the slide lock which likely caused the FTF and FTE. My groups with the G43 were vastly improved with the modified grip as well- it almost felt like I was shooting a handgun with a higher bore axis due to the moderately higher position of the gun in my hand. I'm not a novice with semi-auto handguns, but the majority of my experience with smaller guns at this point has been limited to J-frame revolvers. My G43 mags with the pinky extension and my mag with the +2 really help with comfort and accuracy in my opinion.

    So, consider my "thumbs trimmed!" and the nut behind the trigger adjusted!

    Interestingly, I then shot my G17 with the same (new modified) grip and found that I was more accurate with it- so overall my grip issue on the 43 improved my grip mechanics in general. Win win.

    I'll keep updating as I shoot more; I'm going out again today to put some more rounds through the gun. I want to regain the confidence in this awesome 43 that I have in my other Glocks.

    Thank you all again for responding to my post!

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