Enfield Revolver is the name applied to two totally separate models of self-extracting British handgun designed and manufactured at the government-owned Royal Small Arms Factory in Enfield; initially the .476 calibre (actually 11.6 mm)[1] Revolver Enfield Mk I/Mk II revolvers (from 1880–1889), and later the .38/200 calibre Enfield No. 2 Mk I (from 1923–1957).
The .476 calibre Enfield Mk I and Mk II revolvers were the official sidearm of both the British Army and the Northwest Mounted Police—as well as being issued to many other Colonial units throughout the British Empire—and the later model .38/200 Enfield No. 2 Mk I revolver was the standard British/Commonwealth sidearm in the Second World War, alongside the Webley Mk IV and Smith & Wesson Victory Model revolvers chambered in the same calibre. The term "Enfield Revolver" is not applied to Webley Mk VI revolvers built by RSAF Enfield between 1923 and 1926.