Posted: 12/23/2006 10:34:01 PM EDT
3 times within 50 rounds slide locke open with a half full mag. Factory Glock mag. Got extended release on it but never happened before.
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This was my first thought. But never had the problem with the G17 I've had since 86. And look at the slide stop on this one. I've had the G31 for a year with the extended stop and this has never happened before. I was thinking maybe the recoil coused it. or a week slide stop spring. I hope it's me and not the gun. I'll go back to the range next week and try to figure it out. 
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By not getting the spring under the locking block pin properly, thus you may get a constant upward presure as opposed to a constant downward tension. Easier to show you. I'm a little buffy, I just took the armorer course in November. |
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First pin out is the first pin in. The slide stop spring has to be beneath the locking block pin (which goes in first.) Take the slide off and check by pulling upward a little on the slide catch. If it doesn't pull back down forcefully, it is improperly installed or the spring is screwed up. It's an $8.00 piece from Glock for the extended one. |
Here is where the "Slide Lock Lever Spring"(#7) is positioned when properly installed. If it is in the correct position, then the spring is damaged, the Lever(#1) is bent or as stated you might be riding it with your thumb. From the photo of the "Slide Stop Lever" on your G17, it's bent.
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Thanks for the pic hotrod. I looked in all of mine and I 3 installed incorrectly. |
THE only thing different about this gun this time out is the mag release. The extended release that I put on a year ago kept releasing the mag while I was carrying. I could not find the original release the gun came with. And I was forced to swap the release from my 1986 "NY" Glock 17 and this third generation 31 How could that cause the problem though. |
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It apears that this is a 2 pin gun--if your extended slide release is for a 3 pin gun, that may be the problem. I have a G34 that has a factory extended mag release--it also has a little extra tit of metal above the hole where the trigger pin fits. My latest G17 is a 3 pin gun and it's extended release does NOT have this tit. Maybe that's why? ETA: this is a 2 pin extended: www.lonewolfdist.com/stockdetail.asp?item=GLO-7489 And this is a 3 pin: www.lonewolfdist.com/stockdetail.asp?item=GLO-7496 Just a guess..... and sorry--put them in the wrong places--if your G17 is old enough, it may was the 2 pin version--and no, I don't work for LoneWolf. Sorry again about the mutiple edits! |
See #5 in my post with the photo above. The "slide lock"(1) has nothing to do with the "slide stop"(2)
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Just a note to consider. Glock has done "upgrades", not "recalls". You have a two pin gun. Before I understood that the "upgrade" was the replacement of a series of old parts with a series of new parts designed to work with one another (and not with the old parts!), I thought "gee, something better has come out that is 'better'". So, on a couple of times, I took several glocks to the Glockmeister and he "upgraded" my Glocks. You probably put on a three pin extended release. Put on a two pin. |
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1. You can use a 3 pin slide stop lever on a 2-pin Glock without a problem. I have two 2-pin Glocks and they both have 3-pin slide stops installed with several rounds through them and no malfunctions. You can't install the 2-pin levers on the 3-pin guns unless you file the limiter off. Some people claim you can't use the 3-pin levers in the 2-pin guns because the lever can over extend, but that is simply not true with the slide installed, as it can only go so high in the first place. And that degree of lift, is not enough to pop the spring from where it belongs. 2. Check your locking block and pins to make sure they aren't cracking, bent, or completely broken. A broken locking block can cause excessive frame flex, engaging your slide stop lever, even though there is really nothing wrong with the lever. Many times, you can't tell that the locking block is cracked until you pull it out. 3. Another possibility is that your slide timing has been thrown off by that optic. Is the slide really getting locked back by the lever? Or is that really a failure to feed? It almost looks a little bit too far forward to be locked back by the slide stop lever. |
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The slide stop IS what is holding back the slide. Simply releasing the stop put the gun back in action. The slide stop is the same one I've been using for about a year (I can't find the original one yet). The MAG release is from the 20 year old G17. The spring on the slide release is VERY weak. Compared it to the 20 year old G17 the 31 has about 50% the resistance of the 17. I don't know if this is normal. It returns the release to the down position but seams SO weak that the recoil (357sig) COULD couse this problem (but again it never happened before, same slide release same optic different mag release). I would like to have a stronger slide stop spring. Can I buy just the spring?. I still can't tell which stop is in here without taking it off. Here is a pic in the gun. Thanks.  The gun is a 3rd gen "refubished" model. Going to range sat to see if it's still a problem.  |
Sounds like you might have found the problem. You can remove the "slide stop lever" and bend the spring slightly and it will work correctly for a while. You can't purchase the spring separately. And the mag catch as you know has nothing to do with your problem.
It is the correct one for the G31. 
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I used an aftermarket extended slide stop that did the same thing. Throw away the spring it came with and use your stock GLOCK spring. The slide stop may be bent in too far and is catching on your frame. This happened to me too. If that doesn't work, get rid of the extended slide stop. These things happen when you try to improve perfection. 
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I'm still trying to find the original part. If I can't find it I will have to buy another. |