The DB15 is Diamondback's entry into the AR-15 market, offering a budget-priced direct-impingement carbine in 5.56x45mm with a 16-inch barrel and M4-style collapsible stock. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2012, USA Weight: 6.2 oz Overall length: 32.5" Status: Active Intended use: Home Defense / Sporting