One of the things that frustrates me about AR's is the endless list of things to try when/if a problem arises. Me, I tried 5 or 6 kinds of mags, more than ten kinds of ammo, and all sorts of other things. Soaking the bolt in atf fluid... All sorts of voodoo. And my girlfriends dad has an Olympic that runs like a top even with negligible maintenance.
"An angry prophet, denouncing the hypocrisies of our time"