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New Glock 19 Gen3 is Jamming

Discussion in 'Handguns: Autoloaders' started by faceyournation, May 17, 2012.

  1. Hello Everyone,

    First time posting on the forums here! I just bought my first gun two days ago, a new glock 19 gen 3. I went shooting yesterday with it, put about 300 rounds threw with 4 jams. The rounds are getting stuck when the magazine feeds them into the chamber. The round stays half in the magazine and half in the chamber which doesn't allow the rail to return to it's firing position, so you can see the jam each time it happens. I was using magtech range ammo. The only way I could fix it was to empty the jammed round and the next round that feeds up. I also had about 5 empty shells hit me in the head upon ejection, which isn't a big deal but may help lead to a source of this problem?

    Does anyone know what I could be doing wrong, or what could be malfunctioning on the gun? This is a brand new gun that had never been shot up until yesterday. Does any other glock owners have issues like this? Some friends have told me that the rounds may have not been in proper alignment in the magazine, could this be true?

    Thanks everyone for your input! Aside from the jams I love my new Glock and at this point am not looking to trade it for something else, just want the problem solved.
    Last edited: May 17, 2012
  2. jerkface11

    jerkface11 Well-Known Member

    Try a different brand of ammo to start with. If that doesn't fix it try a different magazine.
  3. I will do that today. Thank you so much for your input! It is valued.

    **Also one note I left out: Once or twice when I went to load the chamber by cocking the slide back and releasing it, the slide stopped about 1/2 inch before fully engaging in the firing position for a moment (approx 2 seconds), and then engaged fully in the firing position. Maybe this could also help figure out a source of the problem?
  4. M1key

    M1key Well-Known Member

    Brand new or just new to you?

    Try hotter ammo like Winchester 115 FMJ, or NATO pressure, or some +P.

    Make sure you use the "slingshot" method to charge it. Don't use the slide release. Pull it all the way back to the stop and let go.

    Lubing it wouldn't hurt either.

    Good luck.

  5. X-Rap

    X-Rap Well-Known Member

    I would try another mag, of the 40-50 Glock mags I have only found one that won't function reliably. IMO they are some of the most reliable out there but there is always that one.
  6. ku4hx

    ku4hx Well-Known Member

    +1 Try several ammunition brands and bullets weights first then if the problem persists, move to a different magazine. I currently have 61 Glock magazines. Two of 61 were replaced by Glock and two others were ditched. The two I trashed were originals with a 1993 purchased NIB G23. They were just not worth trying to salvage.
  7. hentown

    hentown Well-Known Member

    Key information: "I just bought my first gun...." Make sure that your wrists and elbows don't act like shock absorbers. The symptoms are classic limpwristing symptoms. If you're right-handed, you also might find that you're shooting low and left. :)
  8. GLOOB

    GLOOB Well-Known Member

    Take a close look next time you have a jam. Glock has changed the way they manufacture their extractors. The jam you're describing is usually attributed to the extractor and/or ammo profile/OAL/rim thickness. If you ride the slide with your hand, and the round hangs up like that - bingo.

    When the round is fed, the rim is at an angle to the breechface, so the extractor may have to stretch a little in order to accommodate the rim. The rim can hang on the extractor, stopping the case from sliding all the way up over the breech. Then the round jams, with the nose of the bullet tilted up and pressing against the side of the chamber. Take a close look at the extractor/rim interface when you have a jam.

    My gen3 Glock 9mm's extractors have so much clearance this would never happen, no matter how limp your wrist. The rim literally swims around in empty space between the extractor claw and breechface. Kinda odd, actually. But hence, my Glock 9mm's return all the way to battery, anything short of a stovepipe on an empty case. So I suspect this is where your jams are coming from. I mean, limpwristing exacerbates this problem, but at least my Glocks could not have this problem with properly spec'd ammo, period. Could also be the ammo you're shooting has a thicker rim than normal or is otherwise out of spec.

    If this is the problem, it might be you could give the extractor a bit of polishing on the edge that's catching or get a new one. Also have heard that some of the new extractors are stiff/tight upon insertion into the slide. Some people have polished the "body" of the extractor so it moves freely in the slot.

    I had a Daewoo that would occasionally jam like this. Really had to slingshot the first round with authority. Fixed with a little sandpaper to the extractor.
    Last edited: May 17, 2012
  9. C0untZer0

    C0untZer0 Well-Known Member

    Is it brand new or just new to you?

    have you cleaned and lubed it? If you haven't field stripped it, cleaned it and lubed it according to the manual, I'd do that.

    I'd also only do one thing at a time and test after each change you make. If you clean and lube it, polish the extractor, and fire hotter ammo - you haven't learned anything.
  10. skt239

    skt239 Well-Known Member

    I'd bet it is a magazine related problem, if it's not send it back to Glock. I wouldn't go messing around with a bunch of different types of ammo, that's going to get expensive. After all, it's a Glock and not some delicate micro pistol that only works with certain ammo. People buy Glocks so they can shoot almost anything in the caliber, that's always been my experience.
  11. C0untZer0

    C0untZer0 Well-Known Member

    ^ I was going to say that this sounds like a failure to feed, and a lot of times that is caused by a magazine problem, but that easy enough to determine - just set aside the magazine and try another.

    The other thing that can cause this though IMO, is something slowing the slide down, or causing it to not return as quickly / powerfully as it should -that could be dirt/carbon or a lack of proper lubrication, it could also be a weak recoil spring.
  12. Warp

    Warp Well-Known Member

    As noted make sure you try at least two different magazines.

    Use factory ammunition, no reloads.

    Field strip and clean/lightly oil the gun.

    A Glock should eat just about anything provided there isn't something oddly wrong with the magazine, and the ammunition is reasonably within spec

    Do some searching on limp wristing. That really shouldn't be an issue with a quality defensive firearm, but if you are shooting really cheap/weak ammunition and limp wristing badly that could be the problem.
  13. hentown

    hentown Well-Known Member

    The recent extractor/ejector related problems have nothing to do with the symptoms about which the OP posted. Most likely, the nut behind the trigger needs adjusting. ;)
  14. Paul7

    Paul7 Well-Known Member

    I used to have a G19 that never worked right.
  15. Warp

    Warp Well-Known Member

    Did you send it to Glock?
  16. JustinJ

    JustinJ Well-Known Member

    I'd try a different mag and make sure you're not limp wristing. If it's anything beyond that i'd send it back. As far as i'm concerned any modern pistol, ecspecially a glock, should have no trouble running any factory SAMMI spec ammo.
  17. Warp

    Warp Well-Known Member

    JustinJ: I agree. And I never did buy that "limp wrist" excuse for a defensive pistol. We're talking about a gun designed to be used in a life or death situation. You may not have a good, solid grip at that time. I am of the opinion that if it chokes because the inexperienced shooter "limp wrists", the gun has failed.

    This of course assumes the ammunition is not abnormally weak. I realize that the slightly hotter nature of most defensive ammunition can help with this a great deal.
  18. jfrey

    jfrey Well-Known Member

    One other thing to look at, and I had this happen to one of my G19's - new out of the box. You have to strip the pistol but look on the underside of the locking block and see if there is a wear mark all the way across it. If there is only a wear mark on one side or only half way across, the barrel might not be locking up properly. This is very unususal but I did find it in one of mine. Installing a new locking block solved the problem. I would obviously clean and relube it before I got too excited about anything that major. Get some Winchester white box ammo and try that too.
  19. Buck Kramer

    Buck Kramer Well-Known Member

    Limp-wristing is my vote, the slide sounds like it does not have enough power to strip the next round out of the mag, or like stated above, your thumb is riding the slide.
  20. GLOOB

    GLOOB Well-Known Member

    Mag? No, I doubt it. Mags are a common source of a lot of feed problems. But when this happens:
    ... it's quite often due to the interaction between the ammo and the extractor. And it's almost never a magazine related problem. The gun isn't double-feeding. The bullet isn't nose up on the top of the barrel hood. It's not nose down on the ramp. It's halfway in the chamber. The magazine did its job. And the recoil spring should be able to finish it from here. Even IF the gun was limpwristed.
    Last edited: May 18, 2012

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