N-Frame revolver chambered for 10mm Auto and .40 S&W using moon clips. The 610 was introduced alongside FBI adoption of 10mm as a revolver option for agents who preferred wheel guns. The large N-Frame handles 10mm recoil comfortably. Type: Revolver Action: Double-Action Caliber: 10mm Capacity: 6 Year introduced: 1990, USA Weight: 52 oz Overall length: 12" Status: Active Intended use: Hunting, Defense, Collecting