The Gunner profile is a blend of two of the best performing profiles of all time, 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.The extension is coated in Nickel Teflon which maintains incredible dry lubricity, corrosion resistance, and with the coating, tightens up fit between the extension and receiver - again improving upon accuracy. Combined, the Match Series of barrels are ready for when duty calls or the buzzer beeps with unrivaled performance value. Specifications:Barrel Material: 416R Stainless SteelBarrel Type: 5R Button Rifled Barrel Caliber: 6mm ARCBarrel Twist: 1:7.5Barrel Length: 12.5"Barrel Profile: GunnerBarrel Gas System: CarbineInside Finish: Salt Bath Nitride Outside Finish: Salt Bath Nitride Muzzle Thread: 5/8-24 TPIGas Block Diameter: .750 Gas Block Journal Length: 1.9Barrel Extension: M4, Nickel Teflon Coated Weight: 1.26 lbsCrown Type: Recessed 11-degree Target CrownMagnetic Particle Inspected