Faxon Firearms Duty 450 Bushmaster 16'' 1-16 Twist Big Gunner Bbl Nitride

The Faxon Firearms Duty 450 Bushmaster 16" barrel with 1-16 twist is a purpose-built replacement barrel for AR-pattern rifles chambered in 450 Bushmaster. Built from certified 4150 CMV steel and finished in salt bath nitride, this barrel delivers the durability and accuracy shooters expect from a quality Faxon component—without the premium price tag. Whether you're building a dedicated hunting rifle, a subsonic suppressed setup, or upgrading an existing platform, this 16-inch Big Gunner profile barrel handles the job with confidence.

Faxon manufactures these barrels in-house and subjects each one to rigorous quality control. Every barrel is fully stress relieved, air-gauge tested, and inspected via magnetic particle analysis to catch defects before it ships. The 11-degree target crown promotes accuracy and protects the bore from impact during cleaning or handling. The carbine-length gas system and .875" gas block diameter integrate cleanly with standard AR components, while the 11/16x24 muzzle thread accepts common suppressors and muzzle devices.

At 1.72 pounds, the Big Gunner profile strikes a balance between stiffness and practical weight—heavier than a pencil barrel for better heat management and shot-to-shot consistency, but not so heavy that it unbalances a carbine. The 450 Bushmaster's combination of power and shootability has earned loyal followers among hunters and enthusiasts, and a quality barrel like this one unlocks the cartridge's full potential. If you're replacing a factory barrel or completing a build, this Faxon offering represents real value in a no-nonsense component.

Key Features

• 4150 CMV certified steel—military-spec material built to handle full-power loads
• Salt bath nitride finish on bore and exterior for rust resistance and durability
• 11-degree target crown for accuracy and bore protection
• Button rifled with 1-16 twist optimized for 450 Bushmaster performance
• Carbine-length gas system and .875" gas block diameter for standard AR integration
• 11/16x24 muzzle thread for suppressor and muzzle device compatibility
• Fully stress relieved and air-gauge tested for consistent performance
• Magnetic particle inspected to detect material defects
• In-house manufacturing and quality control

Specifications

Frequently Asked Questions

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

Yes. This barrel is designed for AR-pattern rifles and features a standard 16" length and carbine-length gas system. The .875" gas block diameter and 1.1" journal length are compatible with conventional AR carbine components. You will need a 450 Bushmaster-appropriate bolt and bolt carrier to complete your build.

What muzzle devices and suppressors fit this barrel?

The barrel threads at 11/16x24, a common thread pitch for 450 Bushmaster. Most commercial suppressors and muzzle brakes in that caliber will accept this thread pattern, though always verify compatibility with your specific device before purchase.

Is this barrel suitable for hunting?

Yes. The 450 Bushmaster is a popular hunting cartridge, and the 16-inch length with carbine-length gas system makes this barrel practical for a hunting rifle platform. The Big Gunner profile balances heat management and practical weight for field use.

What kind of accuracy can I expect?

Faxon manufactures and inspects these barrels in-house with air-gauge testing, stress relief, and an 11-degree target crown to promote accuracy. Real-world performance depends on ammunition quality, your firearm setup, and shooting technique, but this barrel is built to Faxon's standard for precision.