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Old May 9th, 2018, 11:30 AM #1
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Glock Mag Won't Drop Free

Just picked up a Glock 41 MOS for USPSA Multigun Heavy Metal division, since you can use double stacks, now.

The mags drop free if there's any rounds left in the mag, but if it's completely empty, it occasionally won't drop free; luckily, I figured out why: the slide stop is loose, and sometimes, it drops to the SIDE of the follower, holding the magazine in place if you press the mag release (see photos.) You can "flick" it out or pull a little and it will drop out, but still a pain for a competition gun.

I'm not an experienced Glock guy; is this common? Could the slide stop be out of spec? Is there a known fix for this or just accept that that's the way it is if I run dry?

Are all Glock trigger shoes the same? Could SSVI have sent me the wrong trigger shoe?

Drops free...




Doesn't drop free...





Gratuitous gun photo

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Last edited by BenL; May 16th, 2018 at 08:20 PM.
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Old May 9th, 2018, 11:45 AM #2
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Looks like the slide stop may be bent a little, try to just bend it back
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Old May 9th, 2018, 11:50 AM #3
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Quote:
Originally Posted by magnumpi View Post
Looks like the slide stop may be bent a little, try to just bend it back
Yeah, tried that; behaves the same.
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Old May 9th, 2018, 12:02 PM #4
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Looks like the magazine is canted in the magwell in the photo where it does not release. You might check the mag release to see if it is causing the binding. Does this happen with all of your mags or just the one? Perhaps trying another mag.
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Old May 9th, 2018, 12:51 PM #5
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Quote:
Originally Posted by GuitarmanNick View Post
Looks like the magazine is canted in the magwell in the photo where it does not release. You might check the mag release to see if it is causing the binding. Does this happen with all of your mags or just the one? Perhaps trying another mag.
Three different mags, three different mag releases (two OEM, one aftermarket); same thing.
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Old May 9th, 2018, 01:33 PM #6
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Some more here. I had the issue on some old mags but mine was because of design differences.

https://www.glocktalk.com/threads/dr...s-non.1589960/

https://www.okshooters.com/threads/m...op-free.92825/
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Old May 9th, 2018, 10:15 PM #7
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On the first Polymer80 that I did, I had to open up the hole on the right side of the grip so that the mag release would fully seat with a mag inserted. When I inserted a mag, I would have to slam it quite hard to insure it was in and locked. I traced the problem to the mag release function. The preformed opening was too tight for the mag release to sit flush with the right side of the grip. I used an Exacto knife to enlarge the opening until my mag release(Glock OEM) would slide into position freely and sit flush to the grip surface. Now when I insert a mag, it requires almost no effort, locks into place every time, and drops free when I hit the release.
You did not address my observation about the mag being canted in the magwell when it does not drop. You also said that hitting the mag release will drop the mag. Check the fit of your mag release to the grip. Any resistance to it going into position can cause the issues you describe, IMO. The mag release not seating properly could cause the mag to be off center in the magwell, too. Remove the spring and check for freedom of movement.
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Old June 1st, 2018, 08:41 AM #8
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Check the mag release to see if the side opposite the latch shelf is pushing on the mag when the mag is being released.
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Old June 1st, 2018, 05:33 PM #9
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now i see this thread is a few weeks old...

the tab on one of my glocks completely covers that corner of the mag. no chance for it to catch on the side. maybe pull the trigger and see if that tab kicks in more like mine. as you noted, maybe your trigger is pushing it outwards too much.
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