I sometimes buy ammo from the Ammoman.com. The site advertises ammo in 5.56 that is green tipped. I don't know what that is supposed to mean. Would someone clue me in, please?
I believe that green tip is the M855 ammo, with the SS109 bullet, which has a steel penetrator core. Usually more expensive than the "normal" plinker ammo, usually flagged M193 (IIRC).