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Hello Everyone,

My Glock 20 is having a couple of malfunctions that are occurring more frequently than I would like. Could someone give me some help in diagnosing the problem?

The gun is entirely stock except for the Arotek extended slide release I installed onto the gun when I bought it in 1999. It is one of the models with finger grooves, but no rail.

Using full capacity, factory 15-shot magazines I am having the last round and occassionally the next to last casing of the magazine either get caught on the extractor and not eject or (more commonly) wedge itself perfectly in the center part of the top of the ejection port with half of the casing in the gun and half of it out.

Last weekend out of 150 rounds fired I had 2 of the ejector style malfunctions and 3 of the wedging style. It has had this problem with a range of quality loads (e.g., Winchester, DoubleTap, etc.) and with more than one magazine. Plus, the gun was well lubricated with oil on the rails and on top of the barrel when these problems occurred last weekend.

Am I doing something wrong? Weak mag springs? Weak recoil spring?

Can someone please help?
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- Anthony
 

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This will not be the answer that you want to hear but I can almost assure you that it is being caused by your grip. You may have heard the term "limp wristing" your gun. Make an extra effort to get a good firm grip and a solid foundation for the gun to work against and try a few rounds and see if it gets any better. Glocks generally do NOT just have ejection problems with quality ammo.

Another option would be the wrong spring-loaded bearing in it. If it has an LCI type extractor, it takes a different spring-loaded bearing than a regular extractor and this WILL cause an occassional FTE.

Additionally, check the extractor itself. If the top corner is chipped or beginning to round off, that could also cause it. One of the most common things that causes broken extractors is dropping a round in the chamber and then dropping the slide on it. This forces the extractor to bounce over the rim of the shell and under normal operation, it does NOT do that.

One last thing, if it's not the gun itself, would be a magazine failure. Buy yourself one new mag and try it. If that works, buy you some new mag springs.

I hope this helps you figure it out.
 

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A Glock malfunctioning? Nonsense! You must be seeing things.

But seriously, if this always seems to happen toward the tail end of the magazine, the first thing to try is new magazine springs.


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I would bet that Cope is right....as the gun gets emptier, it gets lighter
too, and recoil 'whips' a little more and is a tad more sensitive to limp-
wristing.
 

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I had never in my life heard the term "limp-wristing" until after Glockism had become a religion about 5 or 10 years ago. So just out of curiosity I took my Glock 20 (Bar-Sto barrel, 3.5 lb. trigger) down to the range and tried my level best to obtain a malfunction through "limp-wristing". I held the pistol as loosely as possible with three fingers of my right hand with my forearm as vertical as possible. I didn't look through the sights because I didn't want to get whomped in the forehead. If I had been looking through the sights I would now have a nice crease on my head! I can't think of any way to get my wrist any limper and still keep the pistol in my hand when firing.

Guess what? Out of three full magazines I experienced no malfunctions whatsoever! Not one. Of course I have a reasonably new magazine spring and recoil spring.

So when I hear "limp-wristing" I will take it to mean "undiagnosed pistol malfunction".


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The term limp wristing came out many, many years before the Glock was even invented. Just because you can't make yours malfunction doesn't mean that it doesn't exist.
As a full-time, professional instructor, I see it fairly regularly and it is monotonously simple to correct on ANY semi-auto pistol. More often than not, it is women and weak, fragile men but we see occassionally on the big guys too.
 

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Wellll, the fact that I can't get my pistol to malfunction when holding it as extremely limply as possible tells me that if someone else gets a malfunction while "limp-wristing" less extremely then there is probably some underlying undiagnosed problem that is possibly being aggravated by limp-wristing.

If such a malfunction is caused by a spring growing weaker, or dirt accumulating, or a part wearing out or fracturing, then it would likely get worse over time, perhaps suddenly, until the malfunction will occur with even the firmest hold. The problem should be diagnosed and corrected, rather than attributed to limp-wristing, so that a serious failure will not happen at a serious time.


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We have NIB guns taken straight from here to my range that have done it. It has always happened and likely always will. With everything else being known new, the diagnosis and the cure is pretty predictable.
AFAIK, the major training schools teach the same thing. I have my doubts that they would teach the diagnosis and the cure if the problem didn't exist.
 

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I've seen it quite a bit, mostly with lighter guns....
 

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That's one of the many, many firearms related questions that would utterly impossible to answer with any degree of certainty without seeing the gun and you shoot it.
That's kinda like askin', "Why does my gun always shoot to the left?" Well, let's see now, there's............
 

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It would seem to me that if limpwristing is a causal variable, then it should be possible to reproduce it and isolate it from variables that inhere in the pistol.


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It is very possible to reproduce it but, like I said, I can't see what you're doing so I can't tell you why you can't do it. I will say that limpwristing is just that...limpwristing. You can hold it as loose as you want and it may still have a solid enough platform to function properly against. If the entire lower receiver is allowed to move rearward freely AS the upper is also trying to move, it will malfunction. If you suspend your Glock by strings tied so that the slide can freely move, it will malfunction pretty much 100%of the time as would most any other semi-auto pistol.
I don't know if I explained that very well but that's the jist of what I say in some of my classes where we demonstrate some of the causes of Type II malfunctions.
 

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That's one of the many, many firearms related questions that would utterly impossible to answer with any degree of certainty without seeing the gun and you shoot it.
That's kinda like askin', "Why does my gun always shoot to the left?" Well, let's see now, there's............
 

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You can hold it as loose as you want and it may still have a solid enough platform to function properly against. If the entire lower receiver is allowed to move rearward freely AS the upper is also trying to move, it will malfunction. If you suspend your Glock by strings tied so that the slide can freely move, it will malfunction pretty much 100%of the time as would most any other semi-auto pistol.
 

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Welll, if, as a professional instructor, you see limpwristing "regularly" and it is "monotonously simple to correct", then it should be monotonously simple to describe it clearly and succinctly enough that it could be reliably reproduced.

The fact that you seem reluctant to do so, combined with my own experience as described, leads me to doubt that the phenomenon exists.


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