Problem with my Glock

[jackliu239]

Sounds like the spring is weak and bumping up from recoil and locking the slide.

OR...perhaps you recently removed it and reinstalled it wrong.

But in anycase, it is a weak or broken spring problem.

Now you mention it, I tried to put the mag back into the gun while the slide is pulled back, and it appears the mag has some room to wiggle a little if I push it up and down. Basically how much wiggle room is there suppose to be when you insert the mag into Glock.

[VictorFranko]

ops, sorry, it was .45 on my Glock 21 I got it mixed up with my M&P9. The ammunition was PMC .45

Getting your calibers, guns and ammo manufacturers mixed up will account for feeding problems

[barrym66]

I went to the range last weekend, and shot about 50rd of .45 out of my Glock 21. And out of those shots, there are about 5 times after the bullet has been discharged but the slide don't feed another round, instead the slide when to lock up position as if the magazine was empty, except there were still bullets in the magazine. When this happened, it was always after after firing the 1st round from the magazine. Anyone have problem like this before?

I'm assuming that the slide cycles but locks back, with no round in the chamber?

Did you try multiple mags? Are all of your springs (mag and recoil) stock? I have had this happen with my G35 and G22 race guns while tuning hand-loads when the recoil spring is too weak, and/or the mag springs are worn. Try some new mag springs (they are cheap from Glock, or the Wolf replacements) first.

Doesn't sound like an ammo problem. I have no experience with the G21 but Glocks are pretty simple and what works on one usually model works on all.

[hcbr]

ditto to what the vet's here said, the spring can cause it to spaz out like that!

[Mstnpete]

You forgot to mention if this was happening on 10rders or Hicaps kits?
Because the kits always had problems with stock oem springs. I would recommend ordering extra power mag springs.

[Moto4Fun]

Hold on! I thought Glocks were impervious to any and all issues. I thought they went bang every time the trigger is pulled regardless of ammo, roundcount, maintenance/cleaning, etc? Now why would it have spring problems with only 2000 rounds?

[HighLander51]

If they are 10 round mags, did you load them to 10 rounds? Glock 10 rounders difficult to load and sometimes the first round will burp. Try loading at 9 rounds and see what happens... I don't think a brand new G21 has mag spring issues.

[stix213]

I'd check the mags by filling the mag, then pushing rounds off the top. Does the next round snap immediately up? Does it lethargically slide up?

[jackliu239]

It was 10rd mag, its not brand new, I have total about 2000rd down the pipe with 2 mags total so I estimate each mag may have loaded 1000rd in their life time so far.

And thank for the answers, I will go replace the springs asap.

[barrym66]

If they are 10 round mags, did you load them to 10 rounds? Glock 10 rounders difficult to load and sometimes the first round will burp. Try loading at 9 rounds and see what happens... I don't think a brand new G21 has mag spring issues.

THIS also! I had forgotten about the need to download the 10 rounders. I have had some factory mags, especially the older 10 rounders and the 2nd generation followers, hiccup when fully loaded up. Resolved with new Wolff mag springs and the latest version followers.

[baz152]

Take your mag apart and run a clean rag through the body. Carbon buildup and dirt can get in there and hold the spring up especially if you use too much lube in the gun and if you use dirty ammo. 1k rounds is not too much for a Glock mag to handle. The only other thing I think it can be is that your thumb is hitting the slide stop.

[tonelar]

Have you recently taken your G21 apart?
You say lockup* position, when you describe what it does when it should have an empty magazine. Do you mean the slide locks back?
Maybe you have the mag catch and spring positioned wrong?

*to most lockup, means the slide is in battery.

[barrym66]

As Baz152 said, also keep the mags clean. here's a great and simple tool for Glock mags: http://www.mygtul.com/

Or you can just use a normal mag brush, like this one: http://www.arredondoaccessories.com/...4901jitls&gid=

I break my mags down and brush off every time they get dropped at outdoor matches, and probably every few months otherwise. Only takes a minute or so per mag.

[supersonic]

1000 rounds per mag? A spring issue that pronounced wouldn't happen after being loaded (then 'unloaded') only 100 times. Not gonna happen. And especially not that abruptly. You would be seeing some intermittent malfunctioning as the spring begins weakening. But even THAT would be WAAAAY down the road. (And, quite frankly, your average shooter usually will rarely, if ever experience a magazine spring failure or 'weakening'). The issue here is most likely your slide lock spring. Like someone asked earlier, did you disassemble/reassemble your G21's frame between your last 2 range trips? If the answer is "yes," then here is a simple way to tell if this is indeed the issue: just field strip your 21. Now, take a good look at your slide lock from behind. On the inboard (right) side of the lever is where the spring is attached and the 'tail' should be clearly visible & underneath the locking block pin. If it isn't, then it was installed incorrectly & you have just found your problem. Let us know what you find. Also, feel free to PM me anytime for help.

HERE:

[jackliu239]

No I never taken apart those 2 mags, I will do it now to clean it, if the problem is dirt build up.