AR15 BARREL 556 16IN A2 SIGHT CHROME BORE BUSHMASTER
Bushmaster AR-15 16" M4 barrel marked "BFI 5.56 NATO 1/9"
Chrome Lined Bore
Includes A2 gas block front sight with bayonet lug, barrel nut and round handguard cap installed
Requires Carbine Length Gas Tube (not included)
Threaded 1/2x28 TPI