Faxon Firearms144602088
Faxon Ar10 Barrel 308 Win - 16" 1:10 Big Gunner Profile$218.00
Availability: In Stock
The Faxon AR-10 barrel in .308 Winchester with a 20-inch Big Gunner profile delivers the precision and durability serious AR-10 shooters demand. This is a medium-taper design that splits the difference between weight savings and rigidity—built for shooters who need barrel stability under sustained fire, whether you're running competition stages, duty cycles, or suppressed shooting. The Big Gunner profile evolved from Faxon's proven track record with their 5.56 barrels, scaled up and optimized for the full-power cartridge.
The profile tapers behind the gas block to .750 inches, compatible with standard AR-10 gas blocks, then steps down to a thinner taper forward of the journal. That geometry reduces rotating mass without sacrificing the rigidity you need for accuracy and consistency. A 1.9-inch gas block journal accommodates both standard blocks and longer aftermarket piston systems if you decide to go that route. The 1:10 twist rate and 11-degree target crown are suited to a wide range of .308 loads, from lighter target rounds to heavier hunting bullets.
Built from 4150 CMV steel with button rifling, the barrel receives a salt bath nitride finish inside and out—corrosion resistance and durability baked in. It comes with an LR-308 (DPMS-compatible) extension, ready to drop into your upper receiver. Faxon's quality control includes magnetic particle inspection to catch any hidden flaws. Fair warning: before you fire, verify headspace with proper gauges—it's the responsible step and Faxon's recommendation for all their barrels.
| Caliber | .308 WIN |
| Barrel Length | 20" |
| Barrel Profile | Big Gunner |
| Twist Rate | 1:10 |
| Material | 4150 CMV Steel |
| Rifling | Button Rifled |
| Gas Block Diameter | .750" |
| Gas Block Journal Length | 1.9" |
| Muzzle Thread | 5/8x24 TPI |
| Finish | Salt Bath Nitride (inside and out) |
| Crown | 11-degree Target Crown |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Weight | Approximately 2.24 lbs |
| Quality Control | Magnetic Particle Inspected |
Yes, the Faxon Big Gunner uses an LR-308 extension (DPMS-compatible), which is the most common AR-10 platform. The .750-inch gas block diameter also works with standard AR-10 blocks. Before assembly, verify headspace using proper PTG headspace gauges.
A 1:10 twist is versatile for .308 Winchester. It stabilizes most common match and hunting bullets, from lighter target loads to heavier magnum-type projectiles. Your specific load will determine optimal performance within that range.
Yes. The 1.9-inch gas block journal length accommodates both standard blocks and longer aftermarket piston systems. The 5/8x24 muzzle threads accept most suppressors designed for .308 rifles. Confirm suppressor compatibility with your suppressor manufacturer.
Headspace is critical for safe, accurate function. Small tolerances between your barrel and bolt can affect firing. Using PTG headspace gauges—go/no-go—ensures your rifle is safe before you fire it. It's a simple, non-negotiable check.
SKU: 144602136 • Width: 1.75in • Height: 1.4in • Depth: 22.95in • Weight: 2.33oz
Availability: In Stock
The Faxon AR-10 barrel in .308 Winchester with a 20-inch Big Gunner profile delivers the precision and durability serious AR-10 shooters demand. This is a medium-taper design that splits the difference between weight savings and rigidity—built for shooters who need barrel stability under sustained fire, whether you're running competition stages, duty cycles, or suppressed shooting. The Big Gunner profile evolved from Faxon's proven track record with their 5.56 barrels, scaled up and optimized for the full-power cartridge.
The profile tapers behind the gas block to .750 inches, compatible with standard AR-10 gas blocks, then steps down to a thinner taper forward of the journal. That geometry reduces rotating mass without sacrificing the rigidity you need for accuracy and consistency. A 1.9-inch gas block journal accommodates both standard blocks and longer aftermarket piston systems if you decide to go that route. The 1:10 twist rate and 11-degree target crown are suited to a wide range of .308 loads, from lighter target rounds to heavier hunting bullets.
Built from 4150 CMV steel with button rifling, the barrel receives a salt bath nitride finish inside and out—corrosion resistance and durability baked in. It comes with an LR-308 (DPMS-compatible) extension, ready to drop into your upper receiver. Faxon's quality control includes magnetic particle inspection to catch any hidden flaws. Fair warning: before you fire, verify headspace with proper gauges—it's the responsible step and Faxon's recommendation for all their barrels.
| Caliber | .308 WIN |
| Barrel Length | 20" |
| Barrel Profile | Big Gunner |
| Twist Rate | 1:10 |
| Material | 4150 CMV Steel |
| Rifling | Button Rifled |
| Gas Block Diameter | .750" |
| Gas Block Journal Length | 1.9" |
| Muzzle Thread | 5/8x24 TPI |
| Finish | Salt Bath Nitride (inside and out) |
| Crown | 11-degree Target Crown |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Weight | Approximately 2.24 lbs |
| Quality Control | Magnetic Particle Inspected |
Yes, the Faxon Big Gunner uses an LR-308 extension (DPMS-compatible), which is the most common AR-10 platform. The .750-inch gas block diameter also works with standard AR-10 blocks. Before assembly, verify headspace using proper PTG headspace gauges.
A 1:10 twist is versatile for .308 Winchester. It stabilizes most common match and hunting bullets, from lighter target loads to heavier magnum-type projectiles. Your specific load will determine optimal performance within that range.
Yes. The 1.9-inch gas block journal length accommodates both standard blocks and longer aftermarket piston systems. The 5/8x24 muzzle threads accept most suppressors designed for .308 rifles. Confirm suppressor compatibility with your suppressor manufacturer.
Headspace is critical for safe, accurate function. Small tolerances between your barrel and bolt can affect firing. Using PTG headspace gauges—go/no-go—ensures your rifle is safe before you fire it. It's a simple, non-negotiable check.
SKU: 144602136 • Width: 1.75in • Height: 1.4in • Depth: 22.95in • Weight: 2.33oz