Clamp-On Piston System Carbine Length .750 Diameter Barrel
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Conversion kit replaces the front sight base, handguard cap, handguards, and bolt carrier assembly on a gas operated AR-15 style upper group or rifle. Piston system operates cleaner than a gas impingement system by diverting the hot gases and carbon from the bolt to a piston at the gas block. Features a hard chrome plated piston that is removable from the gas block, a bolt carrier with an integral impingement key for maximum strength and a gas plug. Includes M4 piston hand guard, handguard cap, clamp-on gas block, piston bolt carrier and piston bolt carrier spring. For carbine length with .750 inch diameter barrel.