The M&P Hand Ejector — S&W's most produced revolver model with over 6 million units manufactured. A medium-frame .38 Special with a 4-inch barrel, fixed sights, and robust construction. The standard-issue revolver for military and police for over half a century. The Model 10 is arguably the most historically important American handgun after the Colt 1911. Type: Revolver Action: Double-Action / Single-Action Caliber: 38 Special Capacity: 6 Year introduced: 1899, USA Weight: 30.5 oz Overall length: 9.5" Status: Active Military use: Yes Intended use: Duty / Service, Law Enforcement, Military