Smith & Wesson

This Smith & Wesson M&P15 AR-15 Carbine Upper Receiver Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation onto any standard AR-15 lower receiver. This A3 flat-top upper receiver comes complete with charging handle bolt carrier assembly A2 front sight with sling swivel bayonet lug and threaded muzzle with flash hider. The 16 chrome lined barrel features a 1 in 9 rate of twist for exceptional accuracy. If you are looking for a reliable AR-15 carbine length upper the M&P15 from Smith & Wesson is a great option. - Material: Aluminum - Cartridge: 5.56x45mm NATO - Barrel Length: 16 Inches - Twist: 1:9 Inches - Threads: 1/2-28 - Barrel Contour: M4 - Sights: Yes - Barrel Finish: Matte Black - Chrome Lined: Yes - Gas Block Diameter: 0.75 Inches - Gas System Length: Carbine - M4 Feed Ramps: Yes - Upper Receiver Type: A3 Flat-Top - Barrel Material: Steel - Handguard: 2-Piece Polymer M4-Style - Bolt Carrier Assembly Included: Yes - Muzzle Device: A2 Flash Hider