FAXON DUTY SERIES GUNNER PROFILE 13.9" MID-LENGTH 5.56 NATO AR15 BARREL
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FAXON DUTY SERIES GUNNER PROFILE 13.9" MID-LENGTH 5.56 NATO AR15 BARREL
Faxon Duty Series Gunner Profile — 13.9" Mid-Length 5.56 NATO (1:8 Twist)
Balanced, pin-weld-ready barrel optimized for accuracy, control, and long-term durability.
The Faxon Duty Series 13.9" Gunner Profile 5.56 NATO barrel represents the perfect balance of weight, performance, and reliability for modern AR-15 builds. By blending the strength of the Government profile with the agility of the Pencil contour, the Gunner design keeps the rifle fast and controllable while maintaining rigidity where it matters. At 13.9", this barrel is ideal for pin-and-weld setups that achieve a 16" legal length once a muzzle device is permanently attached.
Key Benefits
- Balanced Gunner contour: Combines Government durability behind the gas block with Pencil-like weight savings toward the muzzle.
- Pin-and-weld ready: 13.9" length is ideal for permanent muzzle device attachment to reach 16" OAL.
- Mid-length gas system: Offers smoother cycling and lower recoil impulse — excellent for suppressed or unsuppressed use.
- Built for performance: Fully stress relieved, air-gauge tested, magnetic particle inspected, and finished with an 11° target crown.
- Durable materials: Machined from 4150 CMV steel, button-rifled, and black nitride finished inside and out for longevity and corrosion resistance.
- Lightweight yet rigid: Only ~1.26 lbs, improving handling without compromising precision.
Specifications
Why Choose the Gunner Profile
The Gunner profile shifts the rifle’s center of gravity rearward, reducing front-end fatigue and enhancing control during sustained strings of fire. Faxon’s design merges the durability of a Government profile with the agility of a Pencil contour — the result is a barrel that handles faster, shoots flatter, and stays accurate under heat.
Installation & Compatibility
- Fits standard AR-15 uppers and bolts via M4 barrel extension.
- Use a .625" gas block on the 1.9" journal; adjustable gas blocks are recommended for suppressed setups.
- 1/2-28 muzzle threads accept common brakes, comps, and direct-thread suppressors — perfect for pin-and-weld builds.
- Pair with a mid-length gas tube and tuned buffer system for best reliability and recoil impulse.
Frequently Asked Questions
Is the 13.9" barrel good for pin-and-weld builds?
What gas block size fits?
Is this barrel chrome-lined?
What ammo works best?
Overview: Lightweight, Mid-Length 13.9" Gunner Barrel
The Faxon Duty Series 13.9" Gunner Profile Barrel is engineered for shooters seeking an optimized balance between compact size, reliable mid-length cycling, and full-length performance. Its hybrid contour keeps the weight down to around 1.26 lbs while retaining the rigidity required for sustained accuracy and heat control. The result is a barrel that’s fast, stable, and suppressor-friendly.
Each barrel starts as certified 4150 CMV steel, button-rifled with a 1:8 twist for versatile projectile stabilization. It’s then stress-relieved, air-gauge tested, and magnetic particle inspected before receiving a black nitride finish both inside and out for long-term corrosion resistance. The 11° target crown and precision headspace checks ensure consistent performance shot after shot.
Perfect for pin-and-weld rifles or lightweight carbines, the 13.9" mid-length Gunner profile delivers the smooth recoil impulse and extended gas dwell favored by modern shooters — ideal for both duty and recreational builds. It’s a trusted, duty-grade foundation for your next AR-15 project.
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