Faxon Duty Series 10.5" Light Tapered 10mm 4150 QPQ Nitride Barrel

Faxon Duty Series 10.5″ Light Tapered 10mm 4150 Nitride Barrel

The Faxon Duty Series 10.5″ Light Tapered 10mm 4150 Nitride Barrel is a purpose-built option for shooters looking to harness the power of 10mm Auto in an AR-style platform. Engineered with performance and durability in mind, this barrel is ideal for pistol-caliber carbine (PCC) builds that require strength, reliability, and a compact form factor. Faxon’s Duty Series barrels are trusted by professionals and enthusiasts alike for their precision machining and battle-proven materials.

This 10.5″ barrel is machined from 4150 chrome moly vanadium steel and finished inside and out with a black QPQ nitride coating. This treatment enhances corrosion resistance and wear life while maintaining a smooth, low-friction surface for consistent cycling. With a 1:16 twist rate, the barrel is tuned for optimal stabilization of 10mm projectiles across a wide range of bullet weights, delivering dependable accuracy with both range and defensive loads. The light tapered profile strikes a balance between weight reduction and strength, making it well-suited for lightweight PCCs without compromising structural integrity.

The muzzle is threaded 5/8×24, allowing for easy installation of muzzle devices or suppressors tailored to 10mm performance. An 11-degree target crown helps ensure repeatable accuracy by reducing gas disruption at the muzzle. This barrel is non-ported and designed for blowback operation, removing the need for a gas system and simplifying the build process.

It features a standard barrel extension and is compatible with dedicated 10mm AR builds that utilize Glock^® pattern magazines. At just over 1 pound in weight, it adds minimal bulk while maintaining rugged reliability. Whether you’re building a tactical 10mm PCC or a compact defensive firearm, the Faxon Duty Series 10.5″ 10mm barrel provides the strength and precision needed for high-performance shooting.