Dan Wesson's innovative interchangeable-barrel revolver system, allowing the shooter to change barrel lengths with a simple tool. The Model 15 in .357 Magnum was the first production revolver offering user-serviceable barrel replacement. Type: Revolver Action: Double-Action Caliber: .357 Mag Capacity: 6 Year introduced: 1968, USA Weight: 36 oz Overall length: 9.5" Status: Discontinued Intended use: Target, Hunting, Collecting