Faxon Firearms Duty 308 Win 18'' 1-10 Twist Pencil Contour Bbl NitrideFaxon Firearms$247.48
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Faxon Firearms
The Faxon Firearms Duty 308 Win 13.9" barrel is a purpose-built component for shooters who demand performance under pressure. Built on Faxon's proven Big Gunner profile, this .308 Winchester barrel combines a medium-taper design with a thinner forward profile to deliver the weight savings and rigidity needed for duty, competition, and suppressor-ready builds. With a 1-10 twist rate and full nitride treatment inside and out, you're looking at a barrel engineered for reliability and durability when accuracy and speed matter.
The Big Gunner profile reflects real-world feedback from users pushing their rifles hard. The gas block journal sits at .750" diameter and runs 1.9" long—dimensions that accommodate standard gas blocks as well as longer aftermarket blocks and piston kits. This versatility, paired with the tapered design forward of the gas system, keeps the barrel responsive for high rates of fire while maintaining the stiffness needed for precision. The button-rifled 4150 chromoly-vanadium steel is salt bath nitrided for corrosion resistance and longevity.
At 13.9" in length, this barrel balances maneuverability with velocity potential in a compact platform. The .308 Winchester chambering and 5/8x24 TPI muzzle threading give you compatibility with most common muzzle devices, including suppressors. The barrel extension is DPMS-compatible LR-308, designed to work with standard .308 pattern uppers. Every barrel is magnetic particle inspected to catch subsurface defects before it reaches your gun. Faxon recommends verifying headspace with proper gauges before firing.
| Caliber | .308 Winchester |
| Barrel Length | 13.9" |
| Twist Rate | 1:10 |
| Profile | Big Gunner |
| Material | 4150 Chromoly-Vanadium |
| Rifling | Button Rifled |
| Gas System | Rifle |
| Gas Block Journal Diameter | .750" |
| Gas Block Journal Length | 1.9" |
| Muzzle Thread | 5/8x24 TPI |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Finish | Salt Bath Nitride (inside and out) |
| Weight | Approximately 1.8–2.24 lbs |
| Crown | 11-degree Target |
| QC | Magnetic Particle Inspected |
Yes. The barrel extension is DPMS-compatible LR-308, which works with standard .308 pattern uppers. The gas block journal is .750" diameter with a 1.9" length, accommodating most common gas blocks and long-pattern aftermarket blocks or piston kits.
The Faxon Duty barrel is treated with salt bath nitride inside and out, providing strong corrosion resistance and durability suited to duty and high-volume use. Nitride finishes are known for hardness and longevity in field conditions.
Yes. The barrel has 5/8x24 TPI muzzle threading, the standard for .308 suppressors and muzzle devices. The Big Gunner profile is specifically designed as a suppressor-ready platform, and the tapered design helps manage the added weight and back-pressure of a suppressor.
Faxon strongly recommends verifying headspace between the barrel and bolt using proper headspace gauges (such as PTG gauges) before firing. This is critical for safety and reliability.
Faxon Firearms
The Faxon Firearms Duty 308 Win 13.9" barrel is a purpose-built component for shooters who demand performance under pressure. Built on Faxon's proven Big Gunner profile, this .308 Winchester barrel combines a medium-taper design with a thinner forward profile to deliver the weight savings and rigidity needed for duty, competition, and suppressor-ready builds. With a 1-10 twist rate and full nitride treatment inside and out, you're looking at a barrel engineered for reliability and durability when accuracy and speed matter.
The Big Gunner profile reflects real-world feedback from users pushing their rifles hard. The gas block journal sits at .750" diameter and runs 1.9" long—dimensions that accommodate standard gas blocks as well as longer aftermarket blocks and piston kits. This versatility, paired with the tapered design forward of the gas system, keeps the barrel responsive for high rates of fire while maintaining the stiffness needed for precision. The button-rifled 4150 chromoly-vanadium steel is salt bath nitrided for corrosion resistance and longevity.
At 13.9" in length, this barrel balances maneuverability with velocity potential in a compact platform. The .308 Winchester chambering and 5/8x24 TPI muzzle threading give you compatibility with most common muzzle devices, including suppressors. The barrel extension is DPMS-compatible LR-308, designed to work with standard .308 pattern uppers. Every barrel is magnetic particle inspected to catch subsurface defects before it reaches your gun. Faxon recommends verifying headspace with proper gauges before firing.
| Caliber | .308 Winchester |
| Barrel Length | 13.9" |
| Twist Rate | 1:10 |
| Profile | Big Gunner |
| Material | 4150 Chromoly-Vanadium |
| Rifling | Button Rifled |
| Gas System | Rifle |
| Gas Block Journal Diameter | .750" |
| Gas Block Journal Length | 1.9" |
| Muzzle Thread | 5/8x24 TPI |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Finish | Salt Bath Nitride (inside and out) |
| Weight | Approximately 1.8–2.24 lbs |
| Crown | 11-degree Target |
| QC | Magnetic Particle Inspected |
Yes. The barrel extension is DPMS-compatible LR-308, which works with standard .308 pattern uppers. The gas block journal is .750" diameter with a 1.9" length, accommodating most common gas blocks and long-pattern aftermarket blocks or piston kits.
The Faxon Duty barrel is treated with salt bath nitride inside and out, providing strong corrosion resistance and durability suited to duty and high-volume use. Nitride finishes are known for hardness and longevity in field conditions.
Yes. The barrel has 5/8x24 TPI muzzle threading, the standard for .308 suppressors and muzzle devices. The Big Gunner profile is specifically designed as a suppressor-ready platform, and the tapered design helps manage the added weight and back-pressure of a suppressor.
Faxon strongly recommends verifying headspace between the barrel and bolt using proper headspace gauges (such as PTG gauges) before firing. This is critical for safety and reliability.