I'm pretty familiar with the accurizing of bolt action type weapons... I have quiet a bit of self taught experience lol. As far as the AR type platform goes, what options do I have. Obviously trigger job, and most already come with free float tube. Other than that what can I do that will profit in a more accurate gun? Also what are the differences in the Mark 12 issue sniper and a typical issue M-16 as far as accurizing goes?