Faxon Duty Series 11.5" Gunner | 5.56 | Carbine Length

Faxon^® Duty Series 11.5″ Gunner Barrel | 5.56 NATO | Carbine Gas

Lightweight, Suppression-Ready 11.5″ Carbine Barrel

The Faxon^® Duty Series 11.5″ Gunner Barrel chambered in 5.56 NATO is engineered for shooters who demand a lightweight, compact platform with reliable suppressed performance. Designed with a carbine-length gas system, this barrel balances dwell time, cycling reliability, and handling—making it ideal for SBRs, pistols, and duty-focused builds.

Gunner Profile for Strength and Weight Reduction

Faxon’s Gunner profile combines a Government contour behind the gas block with a lightweight forward section that transitions to a full shoulder at the muzzle. This design reduces weight while maintaining structural integrity where it matters most, improving maneuverability without sacrificing durability.

4150 CMV Steel with Nitride Finish

Constructed from certified 4150 CMV steel, this barrel is built for long-term durability and consistent performance. A black nitride finish inside and out enhances corrosion resistance, surface hardness, and wear life while reducing fouling for easier maintenance.

Optimized for Suppressed and Hard-Use Applications

The 11.5″ configuration features a larger-than-average gas port to compensate for shorter dwell time, ensuring reliable cycling across a wide range of ammunition and setups. For optimal performance—especially in suppressed applications—an adjustable gas block is recommended to fine-tune gas flow and recoil impulse.

Precision Manufacturing and Quality Control

Each barrel is fully stress relieved, air-gauge tested, and magnetic particle inspected (MPI) to ensure structural integrity and consistent accuracy. A recessed 11° target crown protects the muzzle and helps maintain stable bullet exit for improved shot consistency.

Faxon^® Duty Series 11.5″ Gunner Barrel Specifications

• Platform: AR-15
• Caliber: 5.56 NATO
• Barrel Length: 11.5″
• Profile: Gunner
• Material: 4150 CMV Steel
• Rifling: Button Rifled
• Twist Rate: 1:8
• Finish: Black Nitride (Inside & Out)
• Gas System: Carbine Length
• Gas Block Diameter: .625″
• Gas Block Journal Length: 1.9″
• Muzzle Threads: 1/2×28 TPI
• Barrel Extension: M4
• Crown: Recessed 11° Target Crown
• Weight: ~1.14 lbs
• Inspection: Stress Relieved, Air-Gauge Tested, MPI, Headspace Checked
• Made In: U.S.A.

Built for Compact, Reliable Performance

The Faxon^® 11.5″ Duty Series Gunner Barrel is designed for shooters building compact rifles that demand reliability, reduced weight, and suppression compatibility. Whether configured for duty use, training, or a suppressor-ready SBR, it provides the durability and performance expected from Faxon’s Duty Series lineup.

Compatibility Notice: Designed for standard AR-15 upper receivers and components. Due to increased gas port sizing for reliability, tuning with buffer weight and/or an adjustable gas block is recommended—especially when running suppressed setups.