Calibers: 9mm. Capacity: 10- or 30-round magazine. Barrel: 5.8” or 8.8”. Weight: 4.3, 5.1 lbs. Length: 13.8”, 17.5” overall. Grips: Textured polymer. Sights: Protected front sight blade, adjustable rear drum. Features: Roll-er-delayed blowback operating system.