The Dan Wesson Model 15 is a medium-frame double-action revolver chambered in .357 Magnum featuring the company's patented interchangeable barrel system. The barrel is secured by a front barrel nut rather than being pinned in the frame, allowing barrels of different lengths to be swapped in the field with a wrench. The 4-inch configuration is the standard service length. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1970, USA Weight: 36 oz Overall length: 9" Status: Active Intended use: duty, target, competition