Faxon Firearms Duty 308 Win 13.9'' 1-10 Twist Big Gunner Contour Bbl NitrideFaxon Firearms$216.20
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Faxon Firearms
The Faxon Firearms Duty 308 Win 18'' barrel is a lightweight precision rifle barrel built for shooters who refuse to compromise between weight savings and performance. Chambered in .308 Winchester to SAAMI spec, this 18-inch pencil contour barrel delivers sub-minute accuracy without the extra heft of a heavier profile—ideal for hunters, precision rifle competitors, and anyone building a versatile .308 AR platform that doesn't sacrifice velocity or durability.
Faxon manufactures this barrel in-house in Cincinnati from certified 4150 CMV steel, then stress-relieves it to ensure dimensional stability under pressure and temperature swings. The 1-10 twist rifling stabilizes the full range of common .308 loadings, from lightweight match rounds to heavy hunting ammunition. Every barrel is magnetic particle inspected, air-gauge tested for bore quality, and individually headspace-checked with precision custom gauges—the kind of process you expect from a company confident enough to stand behind their work.
The 11-degree target crown protects the muzzle and supports accuracy, while the salt bath nitride finish on both the inside and outside delivers corrosion resistance and durability in the field or on the range. Thread the muzzle (5/8x24) with your favorite brake, suppressor, or flash hider. The LR-308 (DPMS-compatible) extension and .750-inch gas block journal integrate seamlessly into modern .308 AR builds, whether you're running rifle-length or mid-length gas systems.
At just 1.97 pounds, this 18-inch pencil barrel proves that you don't have to build a heavy rifle to build an accurate one. Lightweight handling, full-velocity capability, and Faxon's uncompromising QC make this the go-to barrel for .308 builds that hunt, compete, or just plain run.
| Caliber | .308 Winchester |
| Barrel Length | 18 inches |
| Twist Rate | 1:10 |
| Profile | Pencil Contour |
| Material | 4150 CMV Steel |
| Finish | Salt Bath Nitride (inside and outside) |
| Muzzle Thread | 5/8x24 |
| Muzzle Crown | 11-degree Target Crown |
| Gas Block Journal Diameter | .750 inch |
| Gas Block Journal Length | 1.1 inches |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Weight | 1.97 lbs |
| Quality Checks | Magnetic Particle Inspected, Air-Gauge Tested, Individual Headspace Verified |
Yes. The barrel features an LR-308 extension (DPMS-compatible) and fits standard .308 AR-10 builds. Make sure your receiver and handguard support an 18-inch barrel.
The 1-10 twist is designed to reliably stabilize the full range of common .308 Winchester loadings, from match-grade target rounds to standard hunting ammunition.
Yes. The barrel is threaded 5/8x24, the standard for .308 suppressors, brakes, and flash hiders.
The 18-inch pencil contour barrel weighs 1.97 pounds, making it one of the lightest options available while maintaining full .308 performance.
Faxon Firearms
The Faxon Firearms Duty 308 Win 18'' barrel is a lightweight precision rifle barrel built for shooters who refuse to compromise between weight savings and performance. Chambered in .308 Winchester to SAAMI spec, this 18-inch pencil contour barrel delivers sub-minute accuracy without the extra heft of a heavier profile—ideal for hunters, precision rifle competitors, and anyone building a versatile .308 AR platform that doesn't sacrifice velocity or durability.
Faxon manufactures this barrel in-house in Cincinnati from certified 4150 CMV steel, then stress-relieves it to ensure dimensional stability under pressure and temperature swings. The 1-10 twist rifling stabilizes the full range of common .308 loadings, from lightweight match rounds to heavy hunting ammunition. Every barrel is magnetic particle inspected, air-gauge tested for bore quality, and individually headspace-checked with precision custom gauges—the kind of process you expect from a company confident enough to stand behind their work.
The 11-degree target crown protects the muzzle and supports accuracy, while the salt bath nitride finish on both the inside and outside delivers corrosion resistance and durability in the field or on the range. Thread the muzzle (5/8x24) with your favorite brake, suppressor, or flash hider. The LR-308 (DPMS-compatible) extension and .750-inch gas block journal integrate seamlessly into modern .308 AR builds, whether you're running rifle-length or mid-length gas systems.
At just 1.97 pounds, this 18-inch pencil barrel proves that you don't have to build a heavy rifle to build an accurate one. Lightweight handling, full-velocity capability, and Faxon's uncompromising QC make this the go-to barrel for .308 builds that hunt, compete, or just plain run.
| Caliber | .308 Winchester |
| Barrel Length | 18 inches |
| Twist Rate | 1:10 |
| Profile | Pencil Contour |
| Material | 4150 CMV Steel |
| Finish | Salt Bath Nitride (inside and outside) |
| Muzzle Thread | 5/8x24 |
| Muzzle Crown | 11-degree Target Crown |
| Gas Block Journal Diameter | .750 inch |
| Gas Block Journal Length | 1.1 inches |
| Barrel Extension | LR-308 (DPMS Compatible) |
| Weight | 1.97 lbs |
| Quality Checks | Magnetic Particle Inspected, Air-Gauge Tested, Individual Headspace Verified |
Yes. The barrel features an LR-308 extension (DPMS-compatible) and fits standard .308 AR-10 builds. Make sure your receiver and handguard support an 18-inch barrel.
The 1-10 twist is designed to reliably stabilize the full range of common .308 Winchester loadings, from match-grade target rounds to standard hunting ammunition.
Yes. The barrel is threaded 5/8x24, the standard for .308 suppressors, brakes, and flash hiders.
The 18-inch pencil contour barrel weighs 1.97 pounds, making it one of the lightest options available while maintaining full .308 performance.