Glock 21sf problem - update

[EvoXguy]

So I'm having an issue with my 21sf.

It won't chamber a round with mag loaded full with 10 rounds. Even have a problem with getting the mags to fully seat inside the frame. Have to really snap them in.

With 9 rounds loaded it works just fine. Can reproduce the exact same effects with 3 mags and different type ammo.

Anyone have an idea of what's going on?

Thanks!

[Lonestargrizzly]

Lube up the magwell maybe.

[Oceanbob]

Are we to assume it worked fine at one time?

Have you disassembled the Pistol recently?

Bob

[Lonestargrizzly]

Could be pocket lint if you carry it regularly.
God knows my beretta has about a shirts worth of belly button lint inside it.

[EvoXguy]

Are we to assume it worked fine at one time?

Have to disassembled the Pistol recently?

Bob

Yes, took it to the range before and no problems. Havnt used it since about 5 months. Cleaned after the range as well

[blkside]

Is that the only mag you have? Have you tried others to verify they work? Did you disassemble the mag to clean it? Maybe debris inside mag?

[Oceanbob]

Yes, took it to the range before and no problems. Havnt used it since about 5 months. Cleaned after the range as well

Remove the slide. Shove an empty mag into the frame.

When you cleaned the gun did you remove the locking block pin?
Or mess with the slide stop......?

[Win231]

I don't load 10 in mine for the same reason. The 10-round limit makes it very difficult to load the 10th round and also difficult to chamber it.

If you remove the slide & slowly insert a 10-round mag with 10 rounds in it, you'll see why. The top round hits the ejector & when you try to force the magazine to seat, it bends the ejector.

[bk23103]

That is odd. I'm able to get 11 in my G21 mags, and they feed reliably with a plus one.

[EvoXguy]

Is that the only mag you have? Have you tried others to verify they work? Did you disassemble the mag to clean it? Maybe debris inside mag?

Verified same results with 3 factory mags. Never disassembled them

Remove the slide. Shove an empty mag into the frame.

When you cleaned the gun did you remove the locking block pin?
Or mess with the slide stop......?

Nope just a normal strip down to clean.

I don't load 10 in mine for the same reason. The 10-round limit makes it very difficult to load the 10th round and also difficult to chamber it.

If you remove the slide & slowly insert a 10-round mag with 10 rounds in it, you'll see why. The top round hits the ejector & when you try to force the magazine to seat, it bends the ejector.

Yeah I did some research and it appears others have had this problem too. One guys fix was to file down the follewers

[Denver Dick]

Well, in my experience with my five Glocks, including a G21, this is not unusual with California mandated 10 round magazines. By the time you get the 10th round in the magazine, things are pretty darn tight in there. If the slide is closed, it is difficult to insert a fully loaded 10 round magazine. Since I shoot my Glocks only on the range and don't carry them, I usually lock the slide back to begin my shooting, insert the magazine, pull the slide back and let it fly forward. (I believe in Slide Locks, not Slide Releases. )

Now, I can insert a loaded 10 round magazine with the slide forward and get it to seat, but it requires more of a "bang" rather than "shove." If any of you have any hi-cap magazines for Glocks, you will note that when the 13th round of .45 ACP is loaded there is still some play left, not enough to get a 14th round in, but enough to make inserting a loaded magazine in a lot easier. I think that since the hi-cap bans came along, manufacturers have been so deathly afraid that some strong armed ape of a DOJ guy will force an 11th round in a magazine designated as 10 rounder. So, they leave barely enough room for the 10th round with hardly no room at all to spare. After all, no manufacturer wants to be tagged with making illegal 11 round magazines.

[Rifle ronin]

They are very tight! I can usually load all my other mags with my bare hands, no problem. I just got a G21 and have to use the loader provides by Glock. I hope they loosen up over time.

[EvoXguy]

Yeah getting the 10th round in the mag is definitely a pia. It's the part where I can't even chamber a round with them in that has me concerned.

[gargodude]

I'm having the same problem with some new factory 10-round mags I bought for my 28 year-old G17. I can't even get a 10th round in there and I refuse to use a loader. I barely got the 9th round in. If I can't get the 10th in there after a day or so, I'm going to take them apart and see if I can shave down something a bit.

[Truck286]

Its the Mags... Load them and leave them for a few days to a few weeks...