Lead & Steel AR9 9mm 16" 1:10 Twist 1/2x36 Nitride Barrel

The Lead & Steel AR-9 barrel is a straight-profile replacement barrel purpose-built for 9mm Luger pistol-caliber AR platforms. Cut from 4150 Chrome Moly Vanadium Steel and finished in a corrosion-resistant QPQ Black Nitride coating, this barrel is designed for shooters building or refreshing a blowback-style 9mm carbine where reliability and ease of cleaning matter.

At 16 inches in a straight profile, the barrel measures approximately 24.3 oz and carries a 1:10 twist rate optimized for stabilizing common 9mm bullet weights. Muzzle threading is cut to 1/2x36, allowing straightforward mounting of 9mm-appropriate muzzle devices. The barrel uses a simple-blowback gas system, so no gas block or gas tube is required for installation.

Whether you are assembling a dedicated PCC, replacing a worn factory barrel, or building an AR-9 around a specific upper, this Lead & Steel barrel delivers the fit, finish, and geometry to drop in and go.