Faxon Firearms barrels are the pinnacle of value. Manufactured 100% in-house from cradle-to-grave, these 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 start. 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 by precision custom hardened gauges. Barrel Material: 4150 CMV Barrel Type: Button Rifled Barrel Caliber: 458 Socom Barrel Twist: 1:14 Barrel Length: 16" Barrel Profile: Gunner Big Bore Barrel Gas System: Carbine Inside Finish: Salt Bath Nitride Outside Finish: Salt Bath Nitride Muzzle Thread: 11/16x24 Gas Block Diameter: .875" Gas Block Journal Length: 1.1" Barrel Extension: Big Bore barrel extension Weight: 1.72 lbs Magnetic Particle Inspected Polished 11-degree Target Crown