Faxon Firearms Duty Big Gunner .308 Win 18 in 1:10 Nitride

Description

The Faxon Firearms Duty Series Big Gunner is an 18-inch barrel chambered for .308 Winchester designed for AR-10 platforms. It is button rifled from 4150 CMV steel and finished with salt bath nitride for wear resistance and corrosion protection. The barrel features an LR-308 (DPMS-compatible) extension, a 5/8-24 threaded muzzle, and an 11-degree target crown. The gas block journal measures .750 inches in diameter and 1.9 inches in length to fit common blocks and longer aftermarket piston kits.

Key Specifications

• The barrel is chambered for .308 Winchester / 7.62 NATO.
• The twist rate is 1:10.
• The barrel length is 18 inches.
• The barrel profile is Big Gunner.
• The barrel material is 4150 CMV steel.
• The barrel is button rifled.
• The finish is salt bath nitride (black matte).
• The muzzle is threaded 5/8-24.
• The gas block journal diameter is .750 inches and the journal length is 1.9 inches.
• The barrel weight is 2.13 lbs.

Engineered for demanding use, the Big Gunner profile balances rigidity and reduced forward mass to perform as a reliable duty or competition barrel and to function well as a suppressor host. Its combination of 4150 CMV construction, button rifling, and salt bath nitride finish delivers a durable, serviceable component for precision-oriented AR-10 builds.