Caliber: 9mm. Capacity: 17-round magazine. Barrels: 4.1”. Weight: 22.8 oz. Sights: Fixed combat. Features: Polymer frame, striker-fire. The Slim model has a 3.4” barrel (subtract 14%). Tactical model has a 4.6” threaded barrel. Slim Elite has new grip module. Slim Commander Elite has Mischief Machine aluminum grip module (add 67%).