SMITH & WESSON M&P15 CENTERFIRE SEMI-AUTO SERIES
.223 Rem./5.56 NATO or 5.45x39mm cal., GIO, AR-15 style design with 16 in. or longer chrome-lined barrel with muzzle brake, 1:9 or 1:7 (new 2017) rate of twist, aluminum upper and lower receiver, 10 or 30 shot mag. (most are Mil-Spec), one-...