Caliber: 5.7 x 28mm. Capacity: 20-round magazine. Barrel: 5” bull. Grip: Textured aluminum. Sights: Optics-ready. Length: 15” overall. Weight: 3.2 lbs. unloaded. Finish: Matte black. Features: Uses FN P90 50-round double-stack magazines, QD mount in the butt.