The Faxon AR-10 Big Gunner Barrel (brand part number 10A810R18NGQ) is an 18-inch .308 Winchester barrel built in Faxon’s Big Gunner profile for AR-10-pattern rifles. It’s cut with a 1:10 twist to stabilize the full range of common .308 bullet weights and finished with an 11-degree target crown that helps drive consistent accuracy at distance. The barrel uses a mid-length gas system with a .750 gas block journal, weighs 2.13 lbs, and wears a black matte finish over its full 19.1-inch overall length including the threaded extension. It ships threaded for a muzzle device and unfluted, giving builders a straightforward, proven option for a .308 precision or duty AR-10 build.

Key Specifications

• Chambered in .308 Winchester / 7.62 NATO.
• Measures 18 inches in barrel length.
• Cut with a 1:10 twist rate.
• Finished with an 11-degree target crown for accuracy.
• Built with a mid-length gas system and a .750 gas block journal.
• Weighs approximately 2.13 lbs.
• Finished in black matte.
• Ships threaded for a muzzle device.
• Built in Faxon’s Big Gunner profile for the AR-10 platform.

Frequently Asked Questions

What twist rate does this barrel use? A 1:10 twist, suited to common .308 Winchester bullet weights.

Is this barrel threaded? Yes, it ships threaded and ready for a muzzle device.

Buy the Faxon AR-10 Big Gunner Barrel

Build out your .308 AR-10-pattern rifle with a proven 18-inch precision barrel. Order it from our Faxon Firearms lineup of AR-10 barrels for fast, reliable shipping from our Lubbock, Texas gun shop.