Bushmaster XM-15 Complete 5.56x45mm Upper Receiver 16\" Barrel - 00-400003-BLK

Bushmaster 00-400003-BLK: - This 16\" Complete upper by Bushmaster includes a 70705 T6 Forged flat top receiver with full rail, which makes it ready to accept an optic or a rail-mounted carry handle. It has a 4150 Chrome Moly Vanadium M4 profile barrel with 1:9 twist and a chrome inner lining to extend barrel life. It also has a milled low-profile gas block and a target crown, A2 flash hider