Brand: Rock River Arms Model: LAR-15 Caliber/Gauge: 5.56 NATO Finish: Black Stock: Rock River Arms collapsible CAR style Barrel: 18 inch with A2 muzzle device Additional: Rock River Arms' LAR-15 chambered in 5.56 NATO. Comes with flip-up sight gas block, and LAR-8 rear sight/rail combo. The bore and riflings are sharp and clear, and there is little handling wear on the rifle.