This M4 Barreled Upper Assembly is complete and ready to snap onto your Lower. The highly accurate 14.5” M4 Profile Barrel is Chrome Lined and machined from 4150 Chrome Moly Vanadium 11595E Steel. Rifling is 1 x 7” Right Hand twist to stabilize the heavier 75 and 77 grain bullets, and the barrel extension has the M4 style feed ramps. 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.

NOTICE: THIS PART MUST BE USED IN – OR WITH – A PISTOL OR TITLE II RECEIVER (NFA REGISTERED) FOR LEGALITY. This requirement is in accordance with Title 27 Code of Federal Firearms Regulations [Subpart B-Definitions (479.11) (a) thru (g) under Firearms]. For any further questions you may have concerning Local, State or Federal compliance, please contact the Alcohol, Tobacco, & Firearms Bureau. Local listings available at http://www.atf.gov/