Smith & Wesson Performance Center Model 610 with unfluted cylinder — the premium variant with additional cylinder mass for improved swing, balance, and recoil absorption during sustained shooting. Type: Revolver Action: DA/SA Revolver Caliber: 10mm Auto Capacity: 6 Year introduced: 2016, United States Weight: 50 oz Overall length: 12.5" Status: Active Intended use: Competition, Target Shooting