The Faxon Match Series Gunner Profile 11.5" .338 ARC AR-15 Barrel is engineered for compact builds where handling, reliability, and heavy-projectile performance matter. Manufactured 100% in-house in Cincinnati, Ohio, this barrel pairs 416R stainless steel with 5R button rifling and a fast 1:5 twist to support .338 ARC’s heavier bullet options—especially in short-barrel configurations.

Finished with a durable Salt Bath Nitride (QPQ) treatment and built on Faxon’s balanced Gunner Profile, it keeps weight in check while staying stiff where it counts. For best results and minimal modification, we recommend pairing this barrel with our optimized .338 ARC upper — Faxon .338 ARC Optimized Upper.

Key Benefits

• 11.5" Length: Compact handling with the ballistic capability .338 ARC is built for.
• 1:5 Twist: Optimized to stabilize heavier .338 ARC projectiles in short barrels.
• 416R Stainless + 5R Rifling: Match-grade material and rifling geometry for consistency and easier cleaning.
• Gunner Profile: Balanced contour for strength near the chamber with reduced forward weight for maneuverability.
• QPQ (Salt Bath Nitride): Corrosion- and wear-resistant finish for long service life and low maintenance.
• Pistol-Length Gas: Tuned for short-barrel cycling characteristics.
• 5/8x24 Threads: Standard interface for many .30-cal muzzle devices and suppressors (verify ratings).
• MPI Inspected: Each barrel is magnetic particle inspected for added confidence.

Specifications

Important Product Note

Some builds may require minor tuning to ensure optimal feeding, particularly with Hornady Sub-X ammunition. For best results, Faxon recommends Duramag magazines designed for 400 Legend. To minimize fitment work, we also recommend pairing this barrel with our .338 ARC optimized upper. Always verify compatibility with your upper receiver and consult a qualified gunsmith if needed.

Warranty

Backed by Faxon Firearms support and warranty coverage. Review full warranty terms here: FaxonFirearms.com Warranty.

Frequently Asked Questions

Overview: Match Series 11.5" .338 ARC Gunner Barrel

Built for compact performance, the Faxon Match Series 11.5" .338 ARC Gunner Barrel combines 416R stainless, 5R rifling, and a 1:5 twist to support heavier projectiles with repeatable accuracy. The QPQ nitride finish adds corrosion resistance and wear protection, while the Gunner contour keeps handling quick and balanced for SBR/pistol builds.

Proudly made in Cincinnati, Ohio, this barrel is built for serious builders who want short-barrel capability without giving up match-grade consistency. Pair it with our .338 ARC optimized upper and recommended magazines for the smoothest setup.