Faxon Firearms Big Gunner Duty 8.6 Blackout 12in AR-10 Barrel, Nitride, Target Crown A0A863P12NGQ

Product Description

Developed in partnership with Q for the innovative 8.6 Blackout (8.6 BLK), the Faxon Firearms Big Gunner Duty 12-inch barrel is engineered for accuracy and hard use in AR-10 platforms. Each barrel is machined from 4150 steel bar stock, fully stress-relieved, air-gauge tested, and Magnetic Particle Inspected (MPI) to help ensure consistency and reliability. An 11-degree target crown supports precise shot-to-shot performance, while the pistol-length gas system and Big Gunner profile make this a compact, purpose-built option for 8.6 BLK builds. A salt bath nitride treatment is applied inside and out for enhanced corrosion resistance and wear performance, with a black oxide barrel extension for a clean, durable finish.

Product Highlights

• Purpose-built 12-inch 8.6 Blackout barrel developed with Q to maximize the cartridge’s performance
• Quality-control focused build: stress-relieved, air-gauge tested, and MPI inspected
• 11-degree target crown for improved accuracy potential
• Salt bath nitride inside/out for corrosion resistance and durability
• AR-10 compatible DPMS Gen 1 .308 extension with M18x1.5 threading and tapered shoulder (adapter included)

Specs

• Brand: FAXON FIREARMS
• Manufacturer Part Number: A0A863P12NGQ
• UPC: 816341026377
• Caliber: 8.6 Blackout (8.6 BLK)
• Barrel Length: 12 inches
• Profile: Big Gunner
• Gas System Length: Pistol
• Rifling: Button rifled
• Crown: 11-degree target crown
• Material: 4150 steel
• Finish: Salt Bath Nitride (inside/outside); Black Oxide barrel extension
• Muzzle Threads: M18x1.5 with tapered shoulder (adapter included)
• Gas Block Journal: 1.9 inches
• Compatibility: AR-10; standard DPMS Gen 1 .308 extension
• Twist Rate: 1:3

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