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This premium Barrel Kit – 14.5” in length, is turned with the M4 profile (designed for mounting a grenade launcher) and includes all parts forward of the Upper Receiver including Barrel Extension (with M4 Feed Ramps), Barrel Nut, Delta Ring, Weld Spring, Snap Ring, Gas Tube, Gas Tube Spring Pin, M4 Double Heatshield Handguards, Front Handguard Cap, A2 Standard Sight Base with Sling Swivel, Front Sight Post, Front Sight Detent, Bayonet Lug and A2 Flash Hider with Crush Washer. This highly accurate barrel is machined from 4150 Chrome Moly Vanadium 11595E Steel, Chrome Lined in both bore and chamber for long wear and ease of cleaning, and Black Manganese Phosphate finished for protection against rust and corrosion. This is button rifled 1 turn in 7 inches – right hand twist – to stabilize the heavier 50 to 77 grain bullets.
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/