When I constructed my AR (before I knew any better) I put a carbine upper on an A2 lower. It ran GREAT.
I shoot primarily handloads, in it, and I tend to run them hot, so maybe I just lucked into a combination that was right for my style.
The only issue I ever ran into was with Russian lacquered ammo. It would not cycle the stuff, so I took it to a gun show and got rid of it.
Recently I switched to a carbine stock and buffer, and I'm now thinking I could use a heavier buffer.
Last edited by antelope_sniper; 02/21/14.
