Frame pins working loose on polymer framed guns?

I have two Ruger 22/45s, one, a MKII Standard and a MKIII Target. The cross pin that I think runs through the sear assembly is always popping out slightly on both pistol while shooting...

This obviously shouldn't happen but the pins have never protruded far enough to completely disengage and I just push them back in.

I also have two Security Six .357s. One is a pre warning weapon (70s). The other is an early revolver, first year of the warning....you can wiggle the front sight, slightly, on both. The front sight is pinned in and is very secure despite the slight wiggle. They have had a lot of rounds shot through them with absolutely no problems, accuracy is excellent and there is no change in POI.
 
Bill, thank you for adding that. And on some of the LCP's you have two be careful as the Pin on the rear of the grip frame will also start to walk out. I have seen this many times and there have been numerous discussions. The Polymer frame on the LCP has always been one of the weakest links. The rear of the Polymer grip, seems to be a particular vulnerable location where a lot of the stress takes place in that gun. Many of the cracks take place there. I just noticed this again in my forth LCP, Not a big deal, as I just put some loctite on it and punch it back in. I do not know how these pins become loose. I suspect the polymer on that pistol just starts to wear or loosen up with the high recoil. I do not understand why Ruger has never addressed the issue. Kahr for instance use's Steel inserts in all the stress points of the Polymer grip.
 
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I've had pins walk loose on Glocks as well. The fix was to simply replace the pin. It happens I suppose. I classified it as "parts breaking".
 
Cheapshooter- The LCP/P3AT guns have a receiver (frame) that is separate from the grip. It's held in the grip with pins.
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But the OP keeps referring to the "takedown pin". The one pin that is removed in order to take the slide off.
Are you saying the entire metal frame inside the polymer grip frame will come out, and "go down range" if the one pin that retains the slide breaks, or comes out?
Guess maybe I just have to shoot another thousand rounds through my LCP with the stock, factory pin to find out. The first K hasn't done it.
Nor have I ever heard the "common" joke "If you miss the shot, the receiver will take their head off".
I generally use Winchester white box for range, and Speer Gold Dot for carry. Cycling out a mag or two of the GD every couple months. I wonder if this alleged problem comes from people using Buffalo Bores hyped up, over pressure, and non recognised by SAAMI +P ammo.
 
My Glock 19 that I shoot the most has had the trigger pin slide out after about 120 shots at the range. I only noticed it when I was putting in a loaded mag. I was slowly moving out and really worried me. Now I really watch it when I fire over 100 rounds at the range. One thing is that I shoot the Gen 3's better than my Gen 4.
 
My Glock 19 that I shoot the most has had the trigger pin slide out after about 120 shots at the range.
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The trigger pin has a groove in it. Grooves actually, there's one on each end so it doesn't matter how it's installed. The slide stop fits into the groove on the left side of the gun and retains the pin under the tension from the slide stop spring.

There's something wrong with the slide stop/slide stop spring or the trigger pin if the pin isn't staying put.
 
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