Faxon Firearms Big Bore .458 Socom 10.5'' 1-14 Gunner Contour Bbl Nitride

The Faxon Firearms Big Bore .458 SOCOM 10.5" 1-14 Gunner Contour Barrel is purpose-built for shooters serious about big-bore AR-15 builds. If you're stepping up to one of the hardest-hitting intermediate cartridges available in the AR platform, this barrel delivers the durability and precision you need. Chambered in .458 SOCOM and fitted with a pistol-length gas system, it's engineered to handle the serious pressures that come with large-caliber shooting while maintaining the handling characteristics hunters and precision shooters demand from a shorter barrel profile.

Built from 4150 CMV steel and finished with salt-bath Nitride treatment, this barrel resists corrosion and wear in field conditions. The button-rifled bore ensures consistent accuracy, while the 1:14 twist rate is optimized for .458 SOCOM ammunition. A threaded muzzle and 11-degree target crown round out a barrel that's equally at home at the range or in the field, giving you flexibility for suppressors, muzzle devices, or precision shooting setups.

The 10.5-inch length strikes a balance—short enough for compact handling and quick target transitions, yet long enough to generate the velocity the .458 SOCOM needs for effective terminal ballistics. Whether you're building a specialized hunting rifle, a close-range thumper, or exploring what the big-bore AR platform can do, Faxon's Gunner series delivers the precision and toughness to keep up.

Key Features

• .458 SOCOM chamber for hard-hitting intermediate cartridge performance
• 10.5-inch barrel length with pistol-length gas system
• Button-rifled bore for consistent accuracy
• 4150 CMV steel construction for durability under heavy use
• Salt-bath Nitride finish resists corrosion and wear
• Threaded muzzle for suppressors or muzzle devices
• 11-degree target crown for reliable performance
• 1:14 twist rate optimized for .458 SOCOM ballistics

Specifications

Frequently Asked Questions

What is .458 SOCOM and why would I shoot it in an AR-15?

.458 SOCOM is a big-bore intermediate cartridge designed specifically for the AR-15 platform. It delivers significantly more stopping power than standard 5.56 NATO out of a short barrel, making it popular with hunters, home-defense builders, and shooters who want maximum terminal performance from an AR-platform rifle.

Will this barrel work with standard AR-15 receivers and gas tubes?

This barrel is designed for AR-15 pattern rifles and features a pistol-length gas system. However, .458 SOCOM typically requires a larger bolt and carrier than standard 5.56 builds, so verify your upper receiver and bolt carrier compatibility before purchase. This barrel itself is the chamber and bore component; your overall build compatibility depends on your upper receiver and bolt setup.

Can I attach a suppressor to this barrel?

Yes—the barrel features a threaded muzzle, which allows you to attach a suppressor, muzzle brake, or other muzzle device. Verify that your chosen device is rated for .458 SOCOM pressures and that it will work with your specific build configuration.

What makes the Nitride finish different from other barrel coatings?

The salt-bath Nitride finish penetrates the steel surface to create a hard, corrosion-resistant layer that also reduces friction and wear. It's a durable, field-proven finish that protects the bore and exterior without adding thickness like some coatings do.