Faxon Firearms Duty Series AR-15 5.56 NATO 10.5" Pencil Barrel - Black Nitride

The Faxon Firearms Duty Series Pencil barrel is a lightweight AR-15 barrel for compact, short-barrel configurations. It has a 10.5" length and is chambered for 5.56 NATO, with compatibility for .223 Remington ammunition.

Faxon manufactures this barrel from certified 4150 CMV gun-barrel-quality steel with button-cut rifling and a 1:8 twist rate. The lightweight Pencil profile brings barrel weight to 14.4 oz. An M4-pattern barrel extension supports its AR-15 application.

The operating layout uses a carbine-length gas system with a 0.625" gas-block journal, a 1.1" journal length, and a reported 0.081" gas port. At the muzzle, 1/2x28 threads and an 11-degree target crown complete the configuration.

A black QPQ salt-bath nitride finish is applied inside and outside. Model-specific quality checks include full stress relief, air-gauge testing, magnetic-particle inspection, and an individual headspace check. This New item is the barrel component only and is not the separate pinned gas-block package.