Faxon Duty Bbl 300Blk 16" Gnnr Blk

The Faxon Duty 300 Blackout 16" Gunner barrel is a purpose-built option for AR-15 builds that demand a balanced mix of durability, handling, and all-day shootability. Faxon's Gunner profile splits the difference between the tank-tough Government profile and the featherweight Pencil profile, giving you a barrel that won't beat you up during extended range sessions or hunting trips while still delivering the rigidity that counts when accuracy matters. At 16 inches, this barrel strikes a practical midpoint for shooters running modern 300 Blackout setups—short enough to be maneuverable in tight quarters, long enough to wring velocity from subsonic and supersonic loads alike.

Built from certified 4150 CMV steel with a 1:8 twist rate, this barrel arrives stress-relieved, air-gauge tested, and individually headspace-checked using precision PTG gauges. Every barrel leaves Faxon's Cincinnati, Ohio facility with a precisely crowned 11-degree target crown and finished in Nitride—a proven surface treatment that resists corrosion and enhances durability without the brittleness of chrome-lined alternatives. Faxon's manufacturing discipline shows: each barrel passes inspection at every operation, not just at the end, so defects get caught early and often.

The 5/8x24 muzzle thread is standard for 300 Blackout and plays well with suppressors, flash hiders, and brakes built to that spec. If you're building a 300 BLK rifle for hunting, training, or range work and want a barrel that earns its keep without unnecessary weight or complexity, this Gunner profile delivers the balance most shooters actually need.

Key Features

• Gunner profile: balanced weight and durability for all-day shooting comfort
• 4150 CMV steel construction, fully stress-relieved and air-gauge tested
• 1:8 twist rate optimized for 300 Blackout across a wide range of bullet weights
• 11-degree target crown for consistent accuracy
• Nitride finish throughout for corrosion resistance and longevity
• Individual headspace verification with precision PTG gauges
• 5/8x24 muzzle thread for suppressors and muzzle devices

Specifications

Frequently Asked Questions

What muzzle devices fit the 5/8x24 thread?

The 5/8x24 thread is the standard for 300 Blackout suppressors, flash hiders, and muzzle brakes. Verify your muzzle device specs before purchase, but this thread size opens up a wide range of common aftermarket options.

Is this barrel good for subsonic and supersonic ammunition?

Yes. The 1:8 twist rate is suitable for both subsonic and supersonic 300 Blackout loads, giving you flexibility in ammunition choice for hunting, training, or suppressed shooting.

How does the Gunner profile compare to other barrel profiles?

The Gunner profile combines durability from the Government profile with weight savings and handling benefits of the Pencil profile, resulting in better balance and reduced shooter fatigue during extended use.

Will this barrel fit a standard AR-15 upper receiver?

This barrel is designed as a 300 Blackout barrel and uses standard AR-15 barrel extensions and threading. Confirm compatibility with your specific upper receiver before assembly.