One of the questions that is floating around is how to sight in the AR-15.  The AR is an unbelievable platform that works well for Law Enforcement, Military, and Civilian competition.  The AR is accurate, low recoiling, and completely customizable making it the best choice for many shooters. D.R. Middlebrooks of Tactical Shooting Academy is famous for saying the AR is good for anything from 3 yards to 300 yards.  Considering your options for...