A proprietary blend of Hammer forged chrome molly vanadium made by FN that is referred to as "Machine Gun Steel" by virtue of its use in FN's M249 and M240 weapons. The hammer forging process work hardens the steel, making it more durable. In addition, the chrome process for the bore allows for a lining almost twice as thick as a standard M16 barrel for enhanced durability. Mil-spec phosphate coated, MP and HP tested.
Barrel Length: 18"
Gas System: Rifle-length
Barrel Profile: A2 Style
Barrel Steel: Cold Hammer Forged Chrome Moly Vanadium
Barrel Finish: Phosphate
Chrome Lining: Yes, bore and chamber
Muzzle Thread: 5/8-24
Twist Rate: 1/10
Barrel Extension: M4 style
Diameter at Gas Block: .750
Please be sure to check the barrel before installing. Barrels that have been modified may not be returned.