The standard 4-inch Model 66 is the most common configuration of the stainless K-frame Combat Magnum. Produced from 1970 through 1999 and reintroduced in updated form in 2014, it became the preferred duty revolver for departments that wanted .357 Magnum in a corrosion-resistant package. The 4-inch barrel is the duty standard. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1970, USA Weight: 35.5 oz Overall length: 9.38" Status: Discontinued Intended use: duty, law_enforcement, collector