The Diamondback DB9 is an ultra-compact single-stack 9mm pistol designed as one of the smallest 9mm production pistols available. At just 0.8 inches wide, it competes with the Ruger LC9 and Kel-Tec PF-9 for the minimum-dimension 9mm niche. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: 9mm Capacity: 6 Year introduced: 2011, USA Weight: 11 oz Overall length: 5.6" Status: Active Intended use: Deep Concealment, Backup Gun