The Diamondback Firearms DB10 is a usa-made semi-automatic pistol chambered in .308 Winchester, introduced in 2014. Primary use: home defense, sport shooting, tactical. Type: Pistol Action: Semi-Automatic Caliber: .308 Winchester Capacity: 20 Year introduced: 2014, USA Weight: 26 oz Overall length: 7.4" Status: Active Intended use: home defense, sport shooting, tactical