Faxon Firearms121687964
Faxon Firearms Big Gunner 8.6" AR-10 Barrel - 12" Black 10A863P12NGQ$219.00
Availability: In Stock
The Faxon Firearms Big Gunner 8.6 16" AR-10 barrel brings purpose-built precision to the growing 8.6 Blackout platform. Developed in partnership with Q, this 16-inch barrel is engineered for the 8.6 BLK cartridge with a 1:3 twist rate designed to maximize rotational energy and on-target performance. If you're building or upgrading an AR-10 to shoot this modern subsonic round, this barrel delivers the accuracy and durability you need for serious hunting, suppressed shooting, or precision rifle work.
Every Faxon barrel starts as raw 4150 CMV steel, machined in-house at their Cincinnati facility and subjected to rigorous quality control. The Big Gunner goes through stress relief, air-gauge testing, and Magnetic Particle Inspection before receiving an 11-degree target crown—the kind of finish that supports repeatable, tight groups. A Nitride finish provides corrosion resistance and durability, and each barrel is individually headspace-checked against custom hardened gauges before it leaves the shop.
This is a barrel for shooters who understand that the 8.6 Blackout is still finding its footing (it remains non-SAAMI certified at this writing), so handle reloaded ammunition with appropriate caution and verify your ammunition sources. The good news: Faxon stands behind every barrel with a Lifetime Guarantee, so you're covered for the life of your rifle.
The 16-inch profile splits the difference between velocity and maneuverability, making it a versatile choice for AR-10 builds in the subsonic space. Whether you're pushing precision at distance or running a can-equipped setup for reduced report, this barrel rewards quality ammunition and careful technique with consistent, repeatable results.
| Brand | Faxon Firearms |
| Caliber | 8.6 Blackout (8.6 BLK) |
| Barrel Length | 16 inches |
| Twist Rate | 1:3 |
| Material | 4150 CMV steel |
| Finish | Nitride |
| Crown | 11-degree target crown |
| Platform | AR-10 |
| Color | Black |
| Manufacturing | Cincinnati, OH facility |
| Warranty | Lifetime Guarantee |
The 8.6 Blackout (8.6 BLK) is a modern rifle cartridge developed by Q in partnership with Faxon Firearms. At the time of this barrel's release, 8.6 BLK is not SAAMI certified. Use appropriate caution when firing, especially with reloaded ammunition, and source ammunition from reputable manufacturers familiar with the cartridge specifications.
This is an 8.6 Blackout-specific barrel designed for the AR-10 platform. Because 8.6 BLK is a proprietary round, verify that your upper receiver and bolt are compatible with the cartridge before assembly. Consult your upper manufacturer or Q's documentation to confirm compatibility.
The 1:3 twist rate is optimized for 8.6 Blackout projectiles and is designed to channel rotational energy to maximize terminal performance and energy on target. This twist rate is matched to the ballistics of the cartridge for consistent, reliable bullet stability.
Faxon subjects every barrel to stress relief, air-gauge testing, Magnetic Particle Inspection, and an 11-degree target crown to ensure accuracy. Each barrel is also individually headspace-checked. Actual performance depends on your ammunition quality, shooter technique, and overall rifle setup, but this barrel is built to support tight, repeatable groups.
SKU: 121687969 • Weight: 2.33oz
Availability: In Stock
The Faxon Firearms Big Gunner 8.6 16" AR-10 barrel brings purpose-built precision to the growing 8.6 Blackout platform. Developed in partnership with Q, this 16-inch barrel is engineered for the 8.6 BLK cartridge with a 1:3 twist rate designed to maximize rotational energy and on-target performance. If you're building or upgrading an AR-10 to shoot this modern subsonic round, this barrel delivers the accuracy and durability you need for serious hunting, suppressed shooting, or precision rifle work.
Every Faxon barrel starts as raw 4150 CMV steel, machined in-house at their Cincinnati facility and subjected to rigorous quality control. The Big Gunner goes through stress relief, air-gauge testing, and Magnetic Particle Inspection before receiving an 11-degree target crown—the kind of finish that supports repeatable, tight groups. A Nitride finish provides corrosion resistance and durability, and each barrel is individually headspace-checked against custom hardened gauges before it leaves the shop.
This is a barrel for shooters who understand that the 8.6 Blackout is still finding its footing (it remains non-SAAMI certified at this writing), so handle reloaded ammunition with appropriate caution and verify your ammunition sources. The good news: Faxon stands behind every barrel with a Lifetime Guarantee, so you're covered for the life of your rifle.
The 16-inch profile splits the difference between velocity and maneuverability, making it a versatile choice for AR-10 builds in the subsonic space. Whether you're pushing precision at distance or running a can-equipped setup for reduced report, this barrel rewards quality ammunition and careful technique with consistent, repeatable results.
| Brand | Faxon Firearms |
| Caliber | 8.6 Blackout (8.6 BLK) |
| Barrel Length | 16 inches |
| Twist Rate | 1:3 |
| Material | 4150 CMV steel |
| Finish | Nitride |
| Crown | 11-degree target crown |
| Platform | AR-10 |
| Color | Black |
| Manufacturing | Cincinnati, OH facility |
| Warranty | Lifetime Guarantee |
The 8.6 Blackout (8.6 BLK) is a modern rifle cartridge developed by Q in partnership with Faxon Firearms. At the time of this barrel's release, 8.6 BLK is not SAAMI certified. Use appropriate caution when firing, especially with reloaded ammunition, and source ammunition from reputable manufacturers familiar with the cartridge specifications.
This is an 8.6 Blackout-specific barrel designed for the AR-10 platform. Because 8.6 BLK is a proprietary round, verify that your upper receiver and bolt are compatible with the cartridge before assembly. Consult your upper manufacturer or Q's documentation to confirm compatibility.
The 1:3 twist rate is optimized for 8.6 Blackout projectiles and is designed to channel rotational energy to maximize terminal performance and energy on target. This twist rate is matched to the ballistics of the cartridge for consistent, reliable bullet stability.
Faxon subjects every barrel to stress relief, air-gauge testing, Magnetic Particle Inspection, and an 11-degree target crown to ensure accuracy. Each barrel is also individually headspace-checked. Actual performance depends on your ammunition quality, shooter technique, and overall rifle setup, but this barrel is built to support tight, repeatable groups.
SKU: 121687969 • Weight: 2.33oz