The Cimarron Firearms Evil Roy is a usa-made single-action revolver chambered in 357 Magnum, introduced in 2001. Primary use: Cowboy Action, Competition. Type: Revolver Action: Single-Action Caliber: 357 Magnum Capacity: 6 Year introduced: 2001, USA Weight: 37 oz Overall length: 10.75" Status: Active Intended use: Cowboy Action, Competition