Faxon Firearms Duty .400 Legend Rifle Barrel 16inch Gunner Profile Carbine Length 1-16 Twist Black Nitride. 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. Faxon Firearms barrels are the pinnacle of value. Manufactured in-house in Cincinnati Ohio Faxon barrels are fully stress relieved air-gauge tested and 11 degree target crowned to ensure superior accuracy. Quality is imbued into our barrels from the beginning of the manufacturing process.. We start with the best materials either certified 4150 Mil-Spec steel or 416-R Stainless. From there each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace with precision PTG gauges. Specifications for Faxon Firearms Duty .400 Legend Rifle Barrel: Manufacturer: Faxon Firearms Color: Black Nitride Caliber: .400 legend Barrel Length: 16 in Barrel Profile: Gunner Gas System Length: Carbine Length Barrel Twist Rate: 1-16 Package Contents: Faxon Firearms Duty 400 Legend Rifle Barrel Faxon Firearms 15A4L16C16NGQ: Duty 400 Legend Rifle Barrel 16inch Carbine Length 1-16 Twist Black Nitride