The Diamondback DB15 is a tried-and-true, proven line of rifles. This rifle is no exception. Featuring a 15-inch M-Lok rail, Magpul grip, 6-position adjustable stock, and a durable 7075 T6 Aluminum construction. Action semi-auto Casing Black Finish Black Safety Manual Caliber .223 Wylde Capacity 30 Barrel Type 416-R Barrel Length 18"