Caliber: 5.7x28mm. Capacity: 20-round magazine. Barrel: 8". Grips: Magpul MOE-K. Sights: Optics-ready, Picatinny rail. Length: 16.9" overall, brace folded. Weight: 3 lbs. unloaded. Finish: Black hardcoat anodized. Features: DBX muzzle brake, compatible with FN Five-seveN, side-folding brace. Uses an AR-15 mil-spec trigger.