AR-15 5.56 16" stainless steel M4 barrel

AR-15 5.56 16" stainless steel M4 barrel. Chambered in 5.56 NATO (also accept .223 rounds).

• MADE FROM 416 STAINLESS STEEL HARDENED TO 26-32 RC AND STRESS RELIEVED.
•  1-9 RH TWIST. 6 GROOVE BUTTON RIFLED.
• .750" DIAMETER UNDER GAS BLOCK.
• CARBINE LENGTH GAS SYSTEM.
• 1/2-28 STANDARD THREADED MUZZLE END TO ACCEPT MUZZLE BRAKES/COMPENSATORS.
• COMES WITH BARREL EXTENSION AND EXTENSION PIN INSTALLED. THIS BARREL ALSO HAS THE GAS PORT HOLE PRE-DRILLED. BARREL EXTENSION HAS THE M4 FEEDRAMPS.