DIAMONDBACK FIREARMS DBX 5.7X28MM SEMI-AUTO PISTOL The DBX57 Series is chambered in 5.7x28mm and features a monolithic upper, locked breech dual gas piston system with four adjustments, M-LOK compatible handguard, 1/2A-28 RH muzzle device, 20-round FN Five-Seven compatible magazine, rear picatinny rail, rear QD mount, reversible charging handle, and a standard AR15 mil spec trigger. It comes in at an extraordinarily slim build of 1.75" wide at the controls with most of the pistol only being a little over 1" wide, 15.25" long, and has an overall weight of 3lbs. SPECS Finish: Black Hardcoat Anodize Caliber: 5.7 x 28mm Mfg: Diamondback