Questions regarding my 20sf issue

[sqlbullet]

Have you ordered a new slide stop spring yet?  Seems like YOndering's post was overlooked, but that is really the first place to look when you have this malfunction regulary, after the position of the thumbs.

[DM1906]

Have you ordered a new slide stop spring yet?  Seems like YOndering's post was overlooked, but that is really the first place to look when you have this malfunction regulary, after the position of the thumbs.

The spring is integrated with the stop.  If installed incorrectly (in the wrong order), the spring can be damaged/bent.  If any of the assembly pins need any more than bare-hand pressure, something isn't lined up.  I've had some luck bending weak springs to increase stop pressure (during a diagnostic process), but wouldn't advise it as a permanent solution.  It should be replaced.  A broken spring would not only exaggerate the problem, but could also cause other failure issues depending on where the broken-off piece ends up.  The parts are cheap, just replace them.  The majority of the problems I seen have been with the "extended" stop, specifically aftermarket.  It could be a matter of increased stop mass, or inferior aftermarket spring manufacturer.

[445 supermag]

Have you ordered a new slide stop spring yet?  Seems like YOndering's post was overlooked, but that is really the first place to look when you have this malfunction regulary, after the position of the thumbs.

Not yet I have  mag springs first then I will give that a try.  Heck it cant cost more than a few pennys so I will look one up.

But yeah  I guess I did over look that post.   I did go over to the glock store and they have the SLIDE LOCK SPRING  so I guess that is the same thing.  I just don't  want to mess things up.


Brian

[sqlbullet]

The are cheap, and that is the spring.  Look on Youtube for Glock detail strip videos and watch a few.  YOu will get the idea.  As DM1906 says, you can do it wrong, but you will know cause you will be forcing something.

[445 supermag]

Thanks guys.  I am ordering it now. 

This place is great.       Long live the 10mm

Brian

[445 supermag]

I called the glock store and talked to a gock smith and told him of my problems.  He actually stated it sounds more like the SLIDE STOP LEVER more than anything.   He said if one came into his shop thats where he would start.

I was like ok I just ordered both the slide lock spring and the slide stop lever.  Only a couple bucks each so both are on there way.

Will keep you posted

Brian

[sqlbullet]

Sounds good.  Hope that takes care of you!

[445 supermag]

Well so far of my 3 step program.  Wolf x10 mag springs was an utter failure.  Actually made things worse.  Have to go but will be back soon.

Brian

[Edf702]

I'm new here and late to "this party"... Sorry to hear about your feeding problem with your Glock 20SF. I would offer (2) suggestions. First, remove the pins associated with your slide lock and the slide lock will be easily removed. Inspect the "spring" on the slide lock, if it is intact, then it "should" still work. Then re-install in this order.... the top pin, then the slide lock lever with the spring below the top pin, and then the larger bottom pin.

You may need to manipulate the slide stop a little as you push the pin in, once it's lined up correctly, the pin should seat pretty easily. It's a common mistake to install the slide stop lever bottom pin first which leads directly to the problem you describe.

If that is not the issue (the slide stop is installed correctly and problem still exists), try disassembling and give your mags a good clean with some Hornady gun cleaner and dry lube.

Your issue sounds to me anyway, to be either the slide stop lever or a magazine issue. I'm new here, but I'm pretty familiar with Glocks.

[445 supermag]

Hey Ed thanos for your input.  Well I got the springs in the mail and put the the new slide stop lever first and tested before the slide lock spring.  Well with just the new slide stop inplace it got better much better.  Only had about 25 to 30% failure to load that last round in the mag.  I just installed the slide slock spring yesterday.

Well I am looking forward to trying out the gun now with both new items installed.  Will keep you posted.


Ed I am new to glock as this is my first one so help me understand why the order is important for it to run right?

Also just to clarify the 20sf eats everything I feed it till that last round. Then its kind of a crap shoot if it feeds or not.  But with the new slide stop lever its much better. Not perfect yet but better.  Just want to make sure you know what I am dealing with.

Brian

[Edf702]

The slide stop spring is compressed against the top pin. The bottom pin passes through the slide stop lever. If one places the slide stop in place, then inserts the bottom pin before installing the top pin, then when you do insert the top pin, the "spring" will not be compressed against the top pin.

It seems like a trivial thing, but it causes a lot of new Glock owners much grief, exactly as you describe.

[445 supermag]

I must have the order right as its getting better. Not perfect but much better.

Thanks Ed

Brian

[Edf702]

I'm concerned with your "not perfect, but getting better" comment. It really should be "perfect"... If it were mine, the next step would be to disassemble the magazines, clean the internals of the mags and reassemble paying close attention to the "orientation" of the magazine spring and follower. Look online for a diagram on how they go together.

I use "Hornady gun cleaner and dry lube" spray for this and it works well.  If the problem still exists, then replacing the magazine spring would be next. A weak mag spring will lack the tensile strength to lift that last round.

It sounds like a combination of issues. If the slide stop was installed wrong in conjunction with weak mag springs, well, that would be a difficult diagnosis. But if you correct them sequentially, you should be able to eliminate the variables.

[445 supermag]

Thanks Ed for your help.  I tried wolf springs +10 and my issue got WORSE.  But I tried this before I changed the slide stop and the slide stop spring.  I will check out the mags and see what I can see and. Make sure of reassembly is right with everything you mentioned.

Brian

[RMM]

Brian... I am late to this party.  What trigger bar do you have in the gun (does it have the "bumped" striker safety interface?)

My Gen 3 G20SF also started doing exactly what you are describing, it would run fine then lock open with one round left in the magazine.  I thought it was my grip but after some testing I figured out that is wasn't.  Then I went to magazines, I tried four different ones with the same result.  I then removed the slide lock and bent the spring so it had more tension, but at the same time I replaced the trigger bar with a new bumped one after I had screwed up the old one.  It stopped doing it but I'm not sure if it was bending the spring or replacing the trigger bar that did it.  Just some thoughts.