Features Include: M&P 15 Sport II Optics Ready, Gas Operated Semi-Auto, 5.56mm NATO/.223, Capacity: 30, 16" Barrel Length, 35" Overall Length, Weight: 104.2 oz, 4140 Steel Barrel Material, 1 in 9" Barrel Twist, 6-Position CAR Stock, Polymer Grip, Gas Block with Integral Picatinny-Style Rail, QD Sling Swivel Attachment Point, Chromed Firing Pin, Armornite Barrel Finish, Forged Integral Trigger Guard, Forward Assist & Dust Cover, Threaded Barrel.