Faxon Firearms Duty Series Big Bore Barrel .458 Socom 1:14 Twist 4150 Nitride - 10.5" | Gunner Big Bore Profile | Pistol Gas

Overview

The Faxon Duty Series Gunner Big Bore barrel is purpose-built for AR-15 platforms chambered in .458 SOCOM. Machined 100% in-house from certified 4150 mil-spec chrome-moly vanadium bar stock, this barrel features a durable salt bath nitride finish, a 1-in-14 twist rate, and a pistol gas system designed to ensure reliable cycling in a compact configuration. Each barrel undergoes magnetic particle inspection (MPI) and air-gauge testing to ensure superior accuracy and structural integrity. Additional features include a Big Bore barrel extension, a polished 11-degree target crown, and button-rifled construction.

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