The Gunner profile is a blend of two of the best performing profiles of all Gov't and Pencil. Faxon's Gunner profile combines the durability of the Gov't profile with the weight savings and maneuverability of the Pencil profile. The Gunner profile brings the balance of the rifle back towards the shooter's body, limiting fatigue and allowing for shooting, training or hunting all day long. Faxon barrels are fully stress relieved, air-gauge tested and 11 degree target crown to ensure superior accuracy. The 300 Blackout cartridge yields increased performance in shorter barrels and effective subsonic performance. Features 5R button rifling; Gunner profile; pistol barrel gas system; Nitride inside and outside finish; 5/8"x24 thread; recessed target crown; 1.9" gas black journaland M4 barrel extension.