WHAT DOES SMITH & WESSON M&P15 SPORT II SEMI-AUTO RIFLE MEAN?

My very last 12 months as a serious competitor was almost twenty years in the past—I used to be one of several previous guys I realized who was however shooting a M1A .308. I had been a Significant Grasp and Distinguished Rifleman and won two a thousand lawn regional support rifle championships throughout my time and observed no rationale to vary