Had a weird breakage/parts self disassembly of a Colt 6721 today. I don't understand how it happened, and have never even heard of it happening.
A dude was cleaning his way-too-little fired AR outside of our armory. This rifle gets fired twice a year for quals, and sits in a case the rest of it's life (detective supervisor who doesn't think he needs it). He says to come look at his rifle. His buffer retainer and spring had come out. He says he opened it up, and it popped out. I thought he was full of shit and was screwing with something, but the closer I looked, it appeared he didn't screw with anything.
The RE, RE plate, and nut were all pristine. Original factory, still staked. The buffer retainer and spring looked fine. The RE was screwed in what appeared to be the right amount. I could not in any way get the retainer back in without taking the RE crap apart and unscrewing it. Because it was all where it should be. I replaced the part that came out - the recess looked perfect. I flexed everything looking for cracks. Nothing.
What the hell? Has anyone ever heard of this? I wish I would have taken a pic, but my phone was in the car (I can't walk all the way outside and back in - that's too close to exercise). I cannot - for the life of me, figure out how this thing worked its way out. It looks impossible. Someone explain this to me and tell me I'm not crazy. BTW - this was an older, large pin colt with the C carrier. Could this voodoo have something to do with it?