The Diamondback DB-9R is an AR-style 9mm pistol-caliber carbine that accepts GLOCK double-stack 9mm magazines. Features a 16-inch barrel, M-LOK handguard, and direct blowback operation. Competes in the growing AR-9 market. Type: Semi-Auto Pistol Caliber Carbine Action: Semi-Automatic Caliber: 9mm Capacity: 33 Year introduced: 2020, USA Weight: 6.2 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Competition, Range