Caliber: 9mm. Capacity: 10-, 15-, and 17-round magazines. Barrel: 3.4”, 4.0”, or 4.5”. Grip: Textured polymer with modular backstrap. Sights: Post front, notch rear, optics-ready. Length: 6.6”, 7.1”, or 7.7” overall. Weight: 21.7, 23.7, or 25 oz. unloaded. Finish: Matte black. Striker-fire trigger.