The Faxon Firearms Big Gunner 8.6" AR-10 barrel is a purpose-built upper component for shooters stepping into the 8.6 Blackout cartridge. Developed in partnership with Q, this 12-inch barrel harnesses the 1:3 twist rate optimized for the 8.6 BLK round, a powerful subsonic option that channels rotational energy downrange. If you're building or upgrading an AR-10 platform for hunting, suppressed shooting, or precision work, this barrel delivers the specialized geometry the cartridge demands.

Faxon manufactures all their barrels from raw bar stock in their Cincinnati facility, and this Big Gunner is no exception. You get the full Faxon treatment: stress relief, air-gauge testing, magnetic particle inspection, and an 11-degree target crown to support accuracy. The 4150 CMV steel is finished in Nitride, a proven coating that resists corrosion and handles the wear of repeated cycling. Every barrel is individually checked for headspace against precision-hardened gauges before it ships.

One important note: 8.6 Blackout is not yet SAAMI certified, so exercise appropriate caution when firing and especially when working with reloaded ammunition. This is a specialized cartridge for informed reloaders and shooters who understand the platform. Faxon backs this barrel with their Lifetime Guarantee, reflecting confidence in the build quality and durability you're getting.

The Faxon Firearms Big Gunner 8.6" AR-10 barrel is a purpose-built upper component for shooters stepping into the 8.6 Blackout cartridge. Developed in partnership with Q, this 12-inch barrel harnesses the 1:3 twist rate optimized for the 8.6 BLK round, a powerful subsonic option that channels rotational energy downrange. If you're building or upgrading an AR-10 platform for hunting, suppressed shooting, or precision work, this barrel delivers the specialized geometry the cartridge demands.

Faxon manufactures all their barrels from raw bar stock in their Cincinnati facility, and this Big Gunner is no exception. You get the full Faxon treatment: stress relief, air-gauge testing, magnetic particle inspection, and an 11-degree target crown to support accuracy. The 4150 CMV steel is finished in Nitride, a proven coating that resists corrosion and handles the wear of repeated cycling. Every barrel is individually checked for headspace against precision-hardened gauges before it ships.

One important note: 8.6 Blackout is not yet SAAMI certified, so exercise appropriate caution when firing and especially when working with reloaded ammunition. This is a specialized cartridge for informed reloaders and shooters who understand the platform. Faxon backs this barrel with their Lifetime Guarantee, reflecting confidence in the build quality and durability you're getting.