The Diamondback Firearms DBX is a usa-made semi-automatic pistol chambered in 5.7x28mm, introduced in 2020. Primary use: home defense, sport shooting, tactical. Type: Pistol Action: Semi-Automatic Caliber: 5.7x28mm Capacity: 20 Year introduced: 2020, USA Weight: 20 oz Overall length: 7.4" Status: Active Intended use: home defense, sport shooting, tactical