The Kahr K40 is the .40 S&W variant of the original K9 design, using the same ultra-thin all-steel construction in the larger caliber. Type: Pistol Action: Semi-Automatic Caliber: .40 S&W Capacity: 6 Year introduced: 1997, USA Weight: 26 oz Overall length: 6" Status: Active Intended use: Service, Concealed Carry