Faxon Firearms 15A58R18NGQ Duty Series Gunner 5.56x45mm NATO 18″ Target Crown Steel QPQ Black Nitride 4150 Steel Barrel Fits AR15/M16

Overview

The Faxon Firearms Duty Series Gunner barrel is an 18-inch, 5.56x45mm NATO barrel designed for AR-15/M16 platforms. Its Gunner profile combines the strength of a government profile with the maneuverability of a pencil profile, helping to improve balance and reduce shooter fatigue. The barrel is manufactured from 4150 steel and features a QPQ Black Nitride finish for increased corrosion resistance and surface hardness. Engineered for precision, this button-rifled barrel includes an 11-degree target crown and a 1:8 twist rate, which effectively stabilizes both lightweight and heavier match-grade projectiles. It features a mid-length gas system, a .625-inch gas block journal, and an M4 barrel extension. Every unit is fully stress-relieved, air-gauge tested, and magnetic particle inspected to ensure consistent quality and sub-MOA performance potential.

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