16.1" Cold Hammer Forged Barrel, 1 in 7" twist, 5.56mm
Made of Mil Spec M249 Machine Gun barrel steel, with heavy M249 Chrome Lining,
(appx. 2 times as thick as an M4 or M16) Mil Spec Phosphate finish MP HP tested with certification Mid-Length length gas system Shot peened & MP tested bolt Properly staked carrier key Auto carrier Gen III precision machined receiver from 7075-T6 w/extended feed ramps 11.5" Quad Free Float Rail System Low Profile Gas Block pinned to barrel Charging Handle- Raptor ambidextrous Muzzle Device: AAC Blackout Non-mount 1/2-28