Faxon Gunner Duty 5.56 NATO 13.9in Nitride AR-15 Barrel

Faxon Firearms’ Gunner Duty Series barrel provides a 13.9-inch, mid-length gas option for AR-15 platform builds. Constructed using certified 4150 CMV and finished with a black nitride process, the barrel pairs durability and corrosion resistance with a lightweight Gunner contour. It is button rifled and set to a 1:8 twist to stabilize a wide range of 5.56 NATO/.223 Remington projectiles. The muzzle is threaded 1/2-28 and finished with an 11-degree target crown for consistent muzzle alignment.

Key Specifications

• The caliber is .223 Rem/5.56 NATO.
• The barrel measures 13.9 inches.
• The gas system length is Mid-Length.
• The twist rate is 1:8.
• The contour is Gunner.
• The finish is Black Nitride (Black Matte).
• The muzzle is threaded to 1/2-28.
• The barrel is button rifled.
• The barrel weight is 1.29 lbs.
• The muzzle features an 11-degree target crown.

Designed for duty-style carbines, training rigs, and lightweight field rifles, the Faxon Gunner Duty 13.9″ barrel balances handling and longevity without unnecessary bulk. Its combination of a mid-length gas system, durable nitride finish, and practical 1:8 twist makes it a versatile choice for shooters building dependable AR-15 platforms for range use, training, and general-purpose field applications.