The foundational S&W revolver — introduced in 1899 as the Hand Ejector 1st Model, it became the Military & Police (M&P) and was produced continuously in various forms for over 120 years. The swing-out cylinder with simultaneous ejection was S&W's answer to competitive pressure. Adopted by the US Army, Navy, and virtually every American police department. More M&P revolvers have been manufactured than any other S&W revolver. Type: Revolver Action: Revolver Caliber: .38 S&W Special Capacity: 6 Year introduced: 1899, USA Weight: 32 oz Overall length: 9.5" Status: Discontinued Military use: Yes Intended use: military, law enforcement, civilian