Faxon Firearms 15B338A8P16NGQ5RNP3 Gunner 338 ARC 16" Black Nitride 416-R Stainless Barrel Fits AR-15

The Faxon Firearms Gunner 338 ARC barrel is a dedicated AR-15 upper receiver solution for shooters serious about the modern .338 ARC cartridge. This 16-inch barrel gives you the velocity and ballistics the caliber demands in a compact, maneuverable package—ideal for hunters and competition shooters who want effective range without a full-length rifle footprint. Built on 416-R stainless steel and finished with black nitride coating, it combines durability with corrosion resistance and a professional appearance.

The .338 ARC is purpose-built for AR-15 platforms, delivering superior penetration and downrange performance in a standard mag-fed rifle. A 16-inch barrel keeps you mobile in the field or at the range while maintaining the ballistic characteristics that make .338 ARC compelling for hunting medium to large game and precision rifle work. The black nitride finish protects the stainless steel from the elements and hard use, and it looks right at home on a duty or hunting rifle.

This is a drop-in barrel for standard AR-15 upper receivers—swap it with your existing barrel and you're ready to run .338 ARC ammunition. Whether you're building a dedicated .338 ARC upper or upgrading an existing platform, the Faxon Gunner barrel delivers the quality and precision Faxon is known for, with none of the guesswork.

Key Features

• 16-inch barrel length optimized for .338 ARC cartridge performance
• 416-R stainless steel construction for durability and longevity
• Black nitride finish for corrosion resistance and professional aesthetics
• AR-15 compatible—fits standard upper receivers
• Designed for hunting, competition, and precision rifle applications

Specifications

Frequently Asked Questions

Will this barrel work with my AR-15 upper receiver?

Yes. The Faxon Gunner .338 ARC barrel is designed to fit standard AR-15 upper receivers. It's a direct fit replacement for your existing barrel.

What is .338 ARC, and why would I use it?

The .338 ARC is a modern, short-action cartridge optimized for AR-15 rifles. It delivers superior penetration and energy downrange compared to standard 5.56 NATO, making it effective for hunting medium to large game and long-range precision work while maintaining AR-platform reliability and familiarity.

Why 16 inches?

A 16-inch barrel strikes a balance between velocity retention (important for .338 ARC ballistics) and maneuverability in the field or at the range. It's compact enough for hunting or vehicle-based use while delivering the performance the cartridge is designed for.

What's the advantage of black nitride finish on a stainless steel barrel?

Black nitride adds a protective layer that enhances corrosion resistance beyond bare stainless steel alone, giving you durability in harsh conditions. It also provides a professional, duty-grade appearance and resists wear from handling and field use.