Lead & Steel LS9MM45-36 4.5" AR9 Nitride Barrel, 1/2x36 - LS9MM4.5-36

This is a 4.5" AR9 barrel constructed from nitride-finished steel, designed for 9mm AR-platform pistols and short-barreled rifles. The barrel features a 1/2x36 thread pitch for muzzle device attachment. Installation is direct fit for AR9 receivers with standard AR-pattern tooling.