Windham Weaponry UR16M4A4B Complete Upper Assembly 223 Remington/5.56 NATO 16 in 4150 Steel M4 Profile Black Barrel Finish

This M4 Barreled Upper Assembly is complete and ready to snap onto your Lower. The highly accurate 16 M4 profile barrel is chrome lined and machined from 4150 Chrome Moly Vanadium steel - rifled 1 x 9 Right Hand twist. An A2 Flash Suppressor and standard A2 Front Sight are fitted. The machined aluminum flat top Upper Receiver is complete with Bolt Carrier Assembly, Charging Handle, Forward Assist, Ejection Port Cover, and Removable A4 Carry Handle with 300 - 600 meter Dual Aperture Rear Sight.