That's the first time I've heard of it. Are you sure the loading block pin is still in one piece?

Dan

 

You might be asking about the "locking block pin".

I never heard about a loading block pin.
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Too much OIL in the wrong place can cause this to happen.

 

I can't tell you the cause... BUT, I have seen this happen, only once on my father-in-law's 2nd gen G17. We were shooting and just like you, the pin popped out halfway after the last shot. We did the same thing: pushed it back in and kept shooting. No more problems after that... And I've never seen it happen again to this day. Weird you saw the same thing!

 

Your communications will be more successful once you learn and use the correct part numbers. The upper pin is the locking block pin. The lower pin is the trigger pin. The pin in the rear of the grip is the trigger housing pin. The part that locks the slide open is the slide stop lever. The part you hold down to remove the slide is the slide lock.

It is rare that a locking block pin creeps out. Just push it back in, but you must pay attention to the slide stop lever, as it's spring may have become trapped over the pin. It is almost impossible for a trigger pin to creep unless the slide stop lever is broken.

 

The trigger housing pin used to always work itself out of my g19 while firing at the range. I had a gunsmith look at it and he said many glocks have that issue.

 

Thanks for the replies, folks! Keep 'em coming...

As for the slide stop spring, it's "tag" end is under the pin -- I made sure to locate the spring under the locking block pin when I reinserted it into the frame. The slide stop (stock, not a replacement / extended part) appears to be whole and I can't feel anything "wrong" with it.

As mentioned, the problem happened only once and isn't something most of the fellow Glockers I'm around have ever seen -- I'm chalking this up to a planetary alignment / freak occurrence incident. If I see it again I'll talk to the local gunsmith and look into replacement parts.

For the record, it's a 3rd-gen G17 I picked up used this year (in nearly-new condition as part of a group by from a Federal agency by our gun club) and was manufactured in Sept '02 according to the S/N thread. I doubt that matters much, but it's worth mentioning.

Thanks for the advice -- I'll check back here often.

 

The pin probably worked loose because it was inserted too far to one side or the other. Viable solutions include: Doing nothing, buying a new set of pins, making sure the pins are centered in the frame holes, and painting the existing pin with a thin coat of varnish or clear nail polish.

Trigger house pins shouldn't easily work themselves out of the frame. Every time the Glock is fired, rearward pressure is applied to this pin; as long as it is reasonably tight and centered in the frame hole, it should stay put.

(I've, also, heard of shooters who will make a field expedient repair to a Glock pin by squeezing or knocking the ends of the pin out-of-round.)

 

Your communications will be more successful once you learn and use the correct part numbers. The upper pin is the locking block pin. The lower pin is the trigger pin. The pin in the rear of the grip is the trigger housing pin. The part that locks the slide open is the slide stop lever. The part you hold down to remove the slide is the slide lock.

It is rare that a locking block pin creeps out. Just push it back in, but you must pay attention to the slide stop lever, as it's spring may have become trapped over the pin. It is almost impossible for a trigger pin to creep unless the slide stop lever is broken.

+1...check the locking block, slide stop lever, etc. It's very rare...I'd have it looked at by an armorer, too for a full inspection. I'm sure it's no big deal.

 

FYI, I just ran through two courses of fire for my combat league tonight and zero issues. The G17 ran like a champ and no loose pins. I have a feeling it was a fluke. Thanks again, guys!

 

My GLOCK 21SF did this today at the range...I pushed it back in, cleared the weapon and checked...all appeared ok so I reassembled and continued until I emptied the slide...I could see it was still loose but on the range, I couldn't make the "repair."

Once home, I field stripped the pistol and using a pencil point, I pushed the Locking Block Pin (part #34) from left to right and I felt a slight "click"...it seems that it is in solid now...

Glad I found this thread and thanks for the help guys...I checked everything (spring placement) against my G-23 and it looks similar enough...

Thanks again,

Bill