Gauge: .410 bore 2.5 in. Barrel: 19 in. Length: 26.75 in. Weight: 4.9 lbs. Stock: Upper only with quad Picatinny rail fore-end. Features: Charles Daly enters the AR market with a .410 bore shotgun upper. Built of black anodized aluminum. Auto-ejection, gas-operated system. Windage-adjustable rear sight and elevation adjustable rear flip-up sights. Ships with a five-round magazine but compatible with 10 and 15 rounders. This upper must be used with a Mil-Spec lower and carbine-length buffer tube.