Faxon 5.56 NATO 10.5" Pencil Barrel

Faxon 5.56 NATO 10.5″ Pencil Barrel

Modeled after the Colt SP1, an ideal balance of weight and performance.

The Faxon 5.56 NATO 10.5″ Pencil Barrel is a compact, ultra-lightweight option ideal for AR pistol or SBR builds where maneuverability and reduced front-end weight are critical. Machined from durable 4150 Chrome Moly Vanadium (CMV) steel and finished in QPQ Nitride for superior corrosion resistance and surface hardness, this barrel is built for reliability under demanding conditions. The Nickel Teflon coated M4 feed ramp extension enhances feeding performance and adds another layer of ruggedness to the system.

Faxon manufactures all barrels in-house using gun-barrel-grade bar-stock. Each barrel undergoes a rigorous inspection process including headspace verification with precision custom hardened gauges. The result is a consistent, high-performing barrel that exceeds expectations for both recreational and duty use.

This 10.5″ Pencil profile barrel uses a Carbine-length gas system and features a .625″ gas block journal. The reduced diameter front-end keeps the rifle lightweight and quick-handling without compromising heat dissipation or performance. Whether you’re building for home defense, vehicle use, or range fun, this barrel is a top-tier option for those prioritizing weight savings and balance.

Faxon Pencil barrels are among the lightest in the industry and trusted by premium rifle builders including Robar, Kaiser US, and 2A Armament. Their reputation for performance and weight efficiency makes them a go-to choice for streamlined builds that don’t sacrifice on accuracy or reliability.