The Smith & Wesson Model 325 Thunder Ranch edition is an N-Frame .45 ACP revolver using full-moon clips, produced in collaboration with the Thunder Ranch shooting school. It provides a large-frame defensive revolver in a pistol caliber. Type: Revolver Action: Double-Action Caliber: .45 ACP Capacity: 6 Year introduced: 2005, USA Weight: 40.5 oz Overall length: 9.5" Status: Discontinued Intended use: Competition and Defense