Faxon Firearms 15B338A8P125Ngq5Rnp3 Gunner 338 Arc 12.50" Black Nitride 416-R Stainless Barrel Fits Ar-15

The Faxon Firearms Gunner 338 Arc barrel is a 12.5-inch AR-15 barrel engineered for shooters who want carbine-length handling without sacrificing durability. Built from 416-R stainless steel with a black nitride finish, this barrel pairs practical corrosion resistance with a profile that balances weight and strength—ideal for serious shooters who spend extended time at the range, in the field, or training across varied conditions.

The Gunner profile is Faxon's answer to the eternal trade-off between heft and agility. It borrows the proven durability of a government-profile barrel while adopting the lighter, more maneuverable geometry of a pencil design. The result is a barrel that keeps your AR-15 balanced closer to your body, reducing shooter fatigue during long days behind the gun. Whether you're pushing rounds downrange in competition, hunting, or running drills, the Gunner profile lets you shoot longer without wearing out.

Chambered in 338 Arc, this barrel taps into one of modern ammunition's most effective medium-range cartridges. The pistol-length gas system keeps the receiver and bolt carrier running in their reliable sweet spot, minimizing stress and wear while maintaining consistent cycling. The black nitride finish protects the 416-R stainless steel from corrosion, fingerprints, and the elements—essential for any barrel destined for real-world use.

Key Features

• 12.5" barrel optimized for AR-15 carbine handling and balance
• 338 Arc chambering for modern, effective medium-range performance
• Gunner profile: durable yet lightweight for all-day shooting
• 416-R stainless steel with black nitride finish for corrosion resistance
• Pistol-length gas system for reliable cycling and durability

Specifications

Frequently Asked Questions

Will this barrel fit my AR-15 upper receiver?

Yes. This is a standard AR-15 barrel designed to fit conventional AR-15 upper assemblies. Verify your upper is a standard platform before ordering.

What's the advantage of the Gunner profile on a short barrel?

The Gunner profile balances durability with reduced weight and better handling. On a 12.5" barrel, this keeps your rifle balanced and reduces fatigue, making it easier to manage during extended range sessions or tactical work.

Why 338 Arc instead of other AR-15 cartridges?

338 Arc is a modern intermediate cartridge designed to maximize AR-15 effectiveness at medium ranges. It delivers solid ballistics and energy in a round optimized for the AR-15 platform.

What does the black nitride finish do?

Black nitride protects the 416-R stainless steel from corrosion, rust, and surface wear while providing a clean, professional appearance. It's tougher than bluing and requires less maintenance than bare steel.