Glock slide slam

[Huddog]

My G-17 slide has developed an issue that I understand happens with Glocks. Sometimes when one inserts a fresh magazine the slide will go forward chambering a round prior to the slide stop being released. My question is does this create a safety issue for the pistol? Is there a part that should be replaced or is this something that happens?

 

[PoconoEagle]

For me , I would concider replacing the glock with a SIG

 

[Jim Watson]

Seems not to be a safety hazard. I know many competitive shooters who come to depend on it. Hold the gun at the right angle, insert magazine firmly, and the slide closes ready to shoot. Kind of knocks the slidelock vs slingshot argument in the head.

 

[NG VI]

USPs also do that if you seat the magazine vigorously enough. don't think it's a problem unless you want to have pauses between the different stages of reloading. does it still close the slide when you insert it more gently?

 

[CountGlockula]

As long as you keep your finger off the trigger until ready to shoot, you're fine.

Think of it this way: Tactical reloading.

 

[FieroCDSP]

I've heard a lot of questions about this regarding M&P's also. It's a function of the somewhat loose tolerances inherent in the polymer frame designs. The slide can move up just slightly away from the frame. When all things are right, a stiff or fully-loaded mag can shove up on the slide and release it from the slide-stop.

So long as your finger's off the trigger, there is no danger. Its probably best not to rely on that "feature", though. It's inconsistant, and any efforts to make it consistant could hamper the rest of the gun's workings, like preventing a proper lock-open on empty mag.

 

[mballai]

I'm not sure what causes it but my guess is that the slide stop lever spring might be the culprit. You could try changing the slide stop lever(the lever and spring are sold as one part) and see if that doesn't eliminate the problem.

 

[snow92686]

I'm not sure what causes it but my guess is that the slide stop lever spring might be the culprit. You could try changing the slide stop lever(the lever and spring are sold as one part) and see if that doesn't eliminate the problem.

+1 replace the spring and put an extended slide stop lever on while you are at it and it wont happen for another 10k rounds

 

[Huddog]

Thanks all for the information. I will continue to keep the booger hook off the bang switch during reloads, consider an extended slide stop and consider the purchase of a Sig. I addition to though, not in replacement for the G-17.

Huddog

 

[SigP232]

Normal for just about any pistol , if you seat the mag hard the slide will close . I would take a Glock over a Sig anyday. I have owned a few Sig handguns and i found nothing special about them other than there high price..

 

[bwavec]

On the HK boards they refer to slamming a loaded mag in, which moves the slide into battery "the HK slap" method of reloading the USP series of pistols.

It is pretty common to have happen on the USP, but it does require a vigorous "slap" when inserting the mag to make it happen. But I wouldn't 100% rely on it....if it happens great.....if not be prepared to release the slide yourself.

The opinion on the HK boards is that it is not inherently unsafe....as long as you have proper trigger discipline.

Some like it, some don't.....

 

[DoubleTapDrew]

Just out of curiosity what generation is it? My 19 (2nd generation) did it but my 23 and 26 (3rd gen) don't. I wonder if they changed something or if it's just coincidence (or maybe I just loosened up the 19 enough).

 

[Steve C]

Sometimes when one inserts a fresh magazine the slide will go forward chambering a round prior to the slide stop being released.

The symptom occurs because the slide stop isn't fully engaged in its notch. When a fresh magazine is inserted the jostling lets the slide stop disengage and the slide is released. This happens as the springs in the magazine are beginning to wear out or the magazine follower is getting worn. If you manually engage the slide stop you should find that you can't reproduce the slide closing when a magazine is inserted as manual engagement is usually more positive. If you continue to shoot these magazines without replacing the springs or followers (if neede) you will start experiencing a failure of the slide to lock back on last round.

Magazine rebuild kits can be bought or you can buy springs by themselves from Wolf gunsprings.

 

[az-morgan]

I find this tendency mildly annoying because once it starts it is irregular. It does not save any time because I still go to rack the slide by habit. As soon as I can, I install a new slide stop lever (not extended) to stop it.

Az-Morgan

 

[conrad carter]

never had that happen to me. what the h e double toothpicks are you slamming mags home for? i'd worry about the feed lips before i'd worry about the slide releasing. i dropped the sigs from my battery for 3 reasons. high bore axis, long/short trigger pull and service life. only glock made an outdoor pistol worth squat and that's the m29 (cougers are huge here). nobody's put a million rounds through a gun except a glock 17.

 

[DougW]

It only occures on my G17 or G19's when I am doing an empty reload in a match environment. I consider it part of running my Glocks, and not an issue.

 

[esq_stu]

Happens with my Glocks if I slam the mag base home. Id prefer if it happened either every time or never.

 

[Broadhead]

It always happens with my 2 G21s, rarely with a G27. I think it could occur on any pistol with the grip-slide angle not 90 degrees, and more likely to occur with the angle farther from 90 degrees.

When you slap the mag into the well, and the angle is not 90 degrees, part of the force is parallel to the slide, and part of the force is perpendicular to the slide. The parallel component can squeeze the recoil spring, letting the slide retract just enough to release the slide stop lever.

 

[Tecolote]

It must take a lot of force to cause this because I've never had it happen on a Glock. I insert magazines firmly but I don't slam them into the mag well.

 

[creekerdoug]

With 10 round magazines my primary G34 does it each and every time I reload. It is just one more thing to love about Glocks. I use this gun in IDPA and USPSA and it saves a lot of time over the course of a match. It will not do it consistently with standard (hi cap) magazine. I hate that my G21 won't go into battery regardless of the magazines I use. Hopefully, it will loosen up over time.