The Smith and Wesson Military and Police Model 10 is the most produced revolver in history, with over six million manufactured. Standard issue for American military officers and law enforcement departments for most of the 20th century, it served through both World Wars, Korea, Vietnam, and continued as primary police issue into the 1980s. The definition of a service revolver. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 6 Year introduced: 1899, USA Weight: 36.5 oz Overall length: 9.25" Status: Discontinued Military use: Yes Intended use: Military, Law Enforcement