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AR15.COM
5/30/2015 5:55:09 PM EDT
Cleaning my 92fs today after going to the range. Gun only had like 500 rounds though it. Locking block just fell out into my hand. Nothing looks broken. I drove the pin out with a little  persuasion and put it back in. Does this happen ever and should I be looking at this more closely? Nothing seems broken or cracked
5/30/2015 9:59:20 PM EDT
[#1]
For some reason the tolerances can be slight that allow the block to slide out. You shouldn't have to drive any pins out as it should slide back in. I have had it happen on one of mine before, but I had more rounds than that through it.
5/30/2015 10:27:17 PM EDT
[#2]
Same here.  No issue when the gun is assembled.

Seems to get a bit looser as the round could increases.

I don't worry about it.