The most-produced revolver in history. S&W's K-frame .38 Special began as the Hand Ejector 1st Model in 1899 and became the Model 10 in 1957. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 6 Year introduced: 1899, USA Weight: 30.5 oz Overall length: 9.5" Status: Discontinued Military use: Yes Intended use: Collector, Military, Law Enforcement