The Ruger 57 in 5.7x28mm with 4.94-inch barrel. Ruger's entry into the 5.7x28mm pistol market, offering the flat-shooting cartridge at a significantly lower price than the FN Five-seveN. Features a 20-round magazine, optics-ready slide, and fiber optic sights. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: 5.7x28mm Capacity: 20 Year introduced: 2020, USA Weight: 24.5 oz Overall length: 8.65" Status: Active Intended use: Competition, Home Defense, Target