The Faxon Firearms Big Gunner .308 Win 18" barrel delivers a refined medium-taper profile engineered for shooters who demand reliable performance in competition, duty, or suppressed rifle builds. Faxon refined their proven Gunner design based on shooter feedback, creating a .308 barrel that balances weight savings with the rigidity needed for sustained high rates of fire. The 18-inch length hits the sweet spot for maneuverability without sacrificing velocity, making it a natural fit for modern tactical setups, precision AR builds, and sound-suppressed applications.

Built from 4150 CMV steel and finished throughout with salt bath nitride—a proven mil-spec hardening process—this barrel resists corrosion and wear through hard use. The button-rifled 1:10 twist stabilizes a wide range of .308 loads, from match-grade competition rounds to hunting and duty ammunition. The gas block journal measures 0.75 inches in diameter with a 1.9-inch length, accommodating both standard and long-profile gas blocks, as well as piston kits for those building piston-driven systems. The muzzle is threaded 5/8x24 TPI, the industry standard for .308 suppressors and muzzle devices.

The Big Gunner's taper profile steps down behind the gas block, reducing overall barrel weight while maintaining the stiffness required for accuracy and reliability under sustained fire. Faxon includes an 11-degree target crown for clean, consistent bullet release. The barrel extension is LR-308 (DPMS compatible), making integration straightforward on most modern platforms. Every barrel undergoes magnetic particle inspection to catch internal defects before it reaches your bench. Remember to verify headspace with appropriate gauges before your first shot—Faxon recommends PTG headspace gauges for their barrels.

The Faxon Firearms Big Gunner .308 Win 18" barrel delivers a refined medium-taper profile engineered for shooters who demand reliable performance in competition, duty, or suppressed rifle builds. Faxon refined their proven Gunner design based on shooter feedback, creating a .308 barrel that balances weight savings with the rigidity needed for sustained high rates of fire. The 18-inch length hits the sweet spot for maneuverability without sacrificing velocity, making it a natural fit for modern tactical setups, precision AR builds, and sound-suppressed applications.

Built from 4150 CMV steel and finished throughout with salt bath nitride—a proven mil-spec hardening process—this barrel resists corrosion and wear through hard use. The button-rifled 1:10 twist stabilizes a wide range of .308 loads, from match-grade competition rounds to hunting and duty ammunition. The gas block journal measures 0.75 inches in diameter with a 1.9-inch length, accommodating both standard and long-profile gas blocks, as well as piston kits for those building piston-driven systems. The muzzle is threaded 5/8x24 TPI, the industry standard for .308 suppressors and muzzle devices.

The Big Gunner's taper profile steps down behind the gas block, reducing overall barrel weight while maintaining the stiffness required for accuracy and reliability under sustained fire. Faxon includes an 11-degree target crown for clean, consistent bullet release. The barrel extension is LR-308 (DPMS compatible), making integration straightforward on most modern platforms. Every barrel undergoes magnetic particle inspection to catch internal defects before it reaches your bench. Remember to verify headspace with appropriate gauges before your first shot—Faxon recommends PTG headspace gauges for their barrels.