The Charter Arms Professional is a usa-made double-action revolver chambered in .357 Magnum, introduced in 2010. Primary use: self-defense, law enforcement. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 7 Year introduced: 2010, USA Weight: 20 oz Overall length: 6.75" Status: Active Intended use: self-defense, law enforcement