This limited time upper features our 16” M4 Profile Crowned Barreled Upper Assembly chambered in 5.56 is complete and ready to snap onto your Lower – just add sights or Optic of your choice to the machined Picatinny Rail of the Receiver.  The highly accurate 4150 Chrome Moly Vanadium steel barrel has a Melonite QPQ finish inside and out to protect against rust and corrosion and rifled 1 x 9″ Right Hand twist. The barrel extension has the M4 style feed ramps. The muzzle is finished with a plain crown to comply with legal restrictions in States where threaded muzzles and flash hiders are prohibited. This upper does not include Bolt Carrier Assembly and Charging Handle. Grab one here!