Faxon 14.5" M4 5.56 NATO 4150 Chrome Lined Mag Phosphate Carbine-Length Barrel

Faxon 14.5″ M4 5.56 NATO 4150 Chrome Lined Mag Phosphate Carbine-Length Barrel

The Faxon 14.5″ M4 5.56 NATO 4150 Chrome Lined Mag Phosphate Carbine-Length Barrel delivers rugged dependability and consistent accuracy in a compact, duty-ready configuration. Designed and manufactured in-house from 4150 CMV steel, this barrel features the classic M4 profile, offering a reliable balance of strength and weight. The design enhances rigidity without adding bulk, making it ideal for shooters who want a durable carbine-length solution that handles well during extended range sessions or tactical applications.

Chambered in 5.56 NATO, this barrel supports both 5.56 and .223 Remington ammunition, giving shooters maximum flexibility with commonly available rounds. The 1:7 twist rate and button rifled bore allow for excellent stabilization of heavier bullets, including 62-grain to 77-grain match loads. This twist rate is preferred for duty rifles and SBR configurations where versatility and stopping power are crucial. The bore and chamber are chrome-lined, improving corrosion resistance, heat tolerance, and barrel life, especially during high-volume shooting. On the exterior, the manganese phosphate finish provides a durable, non-reflective coating that protects against moisture and environmental wear.

With a carbine-length gas system, this barrel ensures smooth, dependable cycling and compatibility with a broad range of AR-15 components. A .750″ gas block diameter and 1.9″ journal length allow for easy installation of standard gas blocks. The muzzle is threaded 1/2×28 TPI, ready for flash hiders, brakes, or suppressors, and the recessed 11-degree target crown at the muzzle promotes uniform gas exit for improved shot-to-shot accuracy. An M4 barrel extension ensures solid lockup and compatibility with mil-spec upper receivers.

Weighing in at just 1.61 lbs, this barrel maintains an optimal balance between durability and maneuverability. Each unit is magnetic particle inspected to ensure structural integrity and consistent performance.