Diamondback Firearms DB9, Semi-automatic, Striker-Fired, Sub-Compact, 9MM, 3 Barrel, Polymer Frame, Flat Dark Earth Frame, Black Oxide Finish Slide, Fixed Sights, 6 Rounds, 1 Magazine DB0200P061 Diamondback Firearms is proud to present the DB9, a double action only Compact pistol that shoots the classic 9mm Luger. This model comes with a 6 round capacity and features a 3 in. barrel, textured glass filled polymer grips, and a black oxide slide.