Manufactured in-house, 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. SPECS Barrel Material: 4150 CMV Barrel Type: Button Rifled Barrel Caliber: 5.56 NATO Barrel Twist: 1:8 Barrel Length: 7.5” or 14.5" Barrel Profile: Gov't/Socom Barrel Gas System: Mid Length Inside Finish: Nitride Outside Finish: Nitride Muzzle Thread: 1/2-28 Gas Block Diameter: .750" Gas Block Journal Length: 1.9" Barrel Extension: M4 Weight: 7.5” Barrel 1.50 lbs / 14.5” Barrel 1.5 lbs Magnetic Particle Inspected 11-degree Target Crown