The Diamondback DBX57 pistol features a locked breech, dual gas piston. The pistol uses aluminum upper and lower receivers, Magpul MOE-K pistol grip, and a hardcoat anodized metal finish. It includes a DBX muzzle device, Magpul handstop kit, Magpul, rear Picatinny mounted side folding brace, and FN Five-seveN compatible magazine.