338 ARC

Important Product Note for Faxon Match Series 338 ARC AR15 Barrels:

Faxon Firearms strives to deliver high-quality products designed for optimal performance. Please note that some customers may need to adjust their upper receiver feed ramps to ensure proper function, particularly when using Hornady Sub-X ammunition. For best feeding reliability, Faxon recommends pairing this barrel with Duramag magazines designed for 400 Legend. Always ensure compatibility with your specific firearm setup and consult a qualified gunsmith if needed. Faxon Firearms is not liable for damage or performance issues resulting from improper installation or use.

Faxon Match Series .338 ARC barrels are precision-engineered AR-15 barrels designed to deliver consistent accuracy and reliability for the emerging .338 ARC cartridge. Manufactured in the USA from premium 416-R stainless steel, each barrel features 5R rifling to reduce jacket deformation, a recessed 11-degree target crown for consistent bullet exit, and a nickel-Teflon® coated barrel extension for smooth, reliable lockup.

Every Match Series barrel is fully machined and stress relieved in-house, air gauge inspected for bore uniformity, and 100% magnetic particle inspected to verify material integrity after machining. Barrels receive a salt bath nitride finish to enhance surface durability and corrosion resistance while maintaining precision. Offered in multiple barrel lengths and optimized twist rates, Match Series .338 ARC barrels deliver refined, match-grade performance in a ready-to-run format.

Compatibility Note: For optimal feeding consistency with the .338 ARC cartridge, Faxon recommends pairing these barrels with the Faxon .338 ARC-optimized upper receiver.
https://faxonfirearms.com/UR-FAX-F-A-C-338

Faxon .338 ARC Barrels – Maximum Energy in the AR-15 Platform

Faxon Firearms is leading the way in .338 ARC barrel development for the AR-15. Designed around Hornady’s .338 Advanced Rifle Cartridge, our 338 ARC barrels deliver superior energy on target, efficient case geometry, and high-mass projectile capability—all while maintaining full compatibility with the AR-15 platform.

Perfect for medium-range hunting, hog control, and tactical use, the .338 ARC was developed to deliver maximum terminal performance from a magazine-fed system. With optimized performance from shorter barrels and the ability to launch heavy-for-caliber bullets, Faxon’s 338 ARC barrels are the go-to choice for shooters who need power and precision in a compact package.

Built to Harness the Power of .338 ARC

Faxon .338 ARC barrels are built in-house and feature:

  • 416-R stainless steel Match Series construction for strength and accuracy
  • 5R Rifling nitride finish
  • Optimized Feed Ramps consistent feeding, even with heavy subsonic projectiles
  • Threaded 5/8x24 muzzle for suppressors and muzzle brakes
  • Available in 9", 11.5", 12.5", 14.5" and 16” lengths with pistol-length gas systems
  • Standard AR-15 compatibility using 6.5 Grendel-type bolts and mags

Match Series Advantage

Our Match Series 338 ARC barrels use premium 416-R stainless steel and are machined to exacting tolerances. Each barrel is magnetic particle inspected (MPI), stress relieved, and precision air-gauged to ensure top-tier performance for any use—from field to range.

Why Choose Faxon for 338 ARC?

Faxon Firearms was one of the first manufacturers to offer 338 ARC AR-15 barrels. Whether you're building a rifle for predator hunting, suppressed tactical work, or general-purpose shooting, Faxon delivers a barrel built for energy, reliability, and accuracy—without compromise.

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Build for impact. Shoot with confidence.
Browse our full selection of Faxon .338 ARC barrels and experience maximum energy from the AR-15 platform.

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