The Diamondback DB15 with 15-inch free float M-Lok rail is a feature packed AR style rifle at a great price. This direct-impingement AR features a compact 16-inch barrel, collapsible M4 style stock, and mil-spec aluminum upper and lower receivers for excellent reliability, durability and a great base for upgrades or modifications. The DB15 provides custom features at a fraction of the cost, and is a great choice for your next AR.