BCM Upper, Midlength, 16" Hammer Forged Barrel Made by Bravo Company MFG, Inc. ,BCM These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired. These do not include bolt carrier groups, charging handles or handguards. As a note: BCM® barrel components are parkerized separately before assembly. Prior to shipping, all BCM® upper receiver groups are test fired for function, laser bore sighted with a Milspec carry handle for sight alignment within Mil-Specs, and then batch samples are test fired for accuracy. Features Cold Hammer Forged Barrel M4 Feed Ramp Barrel Extension M4 Feed Ramp Flat Top Receiver T-Marked Upper Receivers USGI 1/7 Twist Rates USGI 5.56 NATO Chambers Mil-Spec 11595E - Certified Barrel Steel (CMV) Chrome Lined Bore and Chamber Manganese Phosphate Barrel Finish Mil-Spec F-Marked Forged Front Sights USGI Government Profile Barrels HPT (High Pressure Test) Barrels MPI (Magnetic Particle Inspected) Barrels