Smith & Wesson 13712 M&P15 Sport II OR 5.56x45mm NATO 30+1 16" Black Armornite Steel Threaded Barrel& Receiver, Black 6 Position Stock w/Black Polymer Grip, Right Hand Includes CTS-103 Red Dot, Range Bag, Real Avid Gun Tool ProSmith & Wesson
5.56x45mm NATO