Faxon Firearms 15A58M16NPQ Duty Series 5.56x45mm NATO 16″ Target Crown QPQ Black Nitride 4150 Steel Barrel Fits AR15/M16

Overview

The Faxon Firearms Duty Series 16-inch barrel is precision-engineered for AR-15/M16 platforms. Machined from 4150 mil-spec steel and finished with a durable QPQ black nitride coating, this barrel offers superior corrosion resistance and longevity. It features a pencil profile to minimize weight while maintaining performance during sustained fire. Each barrel is individually headspace-checked using custom hardened gauges for consistency and safety. Designed with a 1:8 twist rate, the barrel stabilizes a wide variety of bullet weights, ranging from 55-grain to 77-grain loads. It features a 1/2-28 thread pattern, an 11-degree target crown, a mid-length gas system, and a 0.625-inch gas block journal. The inclusion of an M4 barrel extension ensures reliable feeding, making this barrel a versatile and lightweight choice for tactical applications, duty rifles, or general-purpose builds.

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