The Official Police was also used by various U.S. It became one of the bestselling police firearms of all time, eventually coming to exemplify typical law enforcement officer weaponry in the 1950s. Released in 1908 as the Colt Army Special, the revolver was renamed the 'Colt's Official Police' in 1927 in order to better market to law enforcement agencies. 38 Special cartridge, and manufactured by the Colt's Manufacturing Company. The Colt Official Police is a medium frame, double-action revolver with a six-round cylinder, primarily chambered for the.