Faxon .300 BLK 7.5" Gunner Barrel

Faxon .300 BLK 7.5″ Gunner Barrel

11-degree target crown, MPI Inspected

The Faxon .300 BLK 7.5″ Gunner Barrel is engineered for shooters seeking uncompromising performance in a compact platform. Made from high-strength 4150 Chrome Moly Vanadium (CMV) steel, this barrel is treated with a corrosion-resistant QPQ Nitride finish for added durability. Faxon’s renowned in-house manufacturing process ensures exceptional quality control, with every barrel going through a rigorous series of inspections and tests, including MPI and precision headspacing.

Optimized for suppressed or unsuppressed use, this barrel is configured with a Pistol-length gas system and a 0.75″ gas block journal. The 7.5″ length makes it ideal for AR pistols and short-barreled rifles (SBRs), offering excellent maneuverability while maintaining ballistic efficiency for .300 AAC Blackout loads. Whether you’re running supers or subs, suppressed or not, this barrel delivers consistent reliability and tight groups downrange.

What makes the Gunner profile special?

The Gunner profile is a carefully engineered balance between strength and weight savings. From the barrel extension to the gas block journal, it uses the proven taper of the Government profile to maintain rigidity where it’s needed most. From there, it transitions into a pencil-thin profile toward the muzzle, shaving unnecessary weight and reducing front-end bulk. This design enhances maneuverability while retaining thermal efficiency and minimizing barrel whip.

Performance-driven design.

The Faxon 7.5″ Gunner Barrel also features an 11-degree target crown for improved muzzle consistency and accuracy. Combined with the M4 feed ramp extension and Nitride finish, this barrel is built for high round counts and rugged use without compromising on precision.

Barrel Features:

• 4150 CMV Steel – Mil-spec durability
• QPQ Nitride Finish – Wear and corrosion resistance
• 11-Degree Target Crown – Enhanced accuracy
• Pistol-Length Gas System – Suppressor friendly
• 0.75″ Gas Block Journal – Industry standard size
• Gunner Profile – Government taper rear, pencil front
• M4 Feed Ramp Extension – Improved reliability
• Individually MPI Inspected & Headspace Checked

Technical Specifications:

• Caliber: .300 AAC Blackout
• Barrel Length: 7.5″
• Material: 4150 Chrome Moly Vanadium Steel
• Finish: QPQ Salt Bath Nitride
• Gas System: Pistol-Length
• Gas Block Journal: 0.75″
• Barrel Profile: Gunner
• Crown: 11-Degree Target Crown
• Feed Ramp: M4 Extension
• Twist Rate: 1:8 RH
• Rifling Type: Button Rifled

If you’re building a compact .300 BLK pistol or SBR and want a lightweight barrel that delivers proven performance and reliability, the Faxon .300 BLK 7.5″ Gunner Barrel is an outstanding choice. We are always here to help!