Enfield Revolver is the name applied to two totally separate models of self-extracting British handgun

Handgun

A handgun is a firearm designed to be held and operated by one hand. This characteristic differentiates handguns as a general class of firearms from long guns such as rifles and shotguns ....

 designed and manufactured at the government-owned Royal Small Arms Factory

Royal Small Arms Factory

The Royal Small Arms Factory was a UK government-owned rifle factory in the London Borough of Enfield in an area generally known as the Lea Valley. The factory produced British military rifles, muskets and swords from 1816...

 in Enfield

Enfield Town

Enfield Town is the historic town centre of Enfield, formerly in the county of Middlesex and now in the London Borough of Enfield. It is north north-east of Charing Cross...

; initially the .476

.476 Enfield

The .476 Enfield is a British centrefire black powder revolver cartridge....

 calibre (actually 11.6 mm) 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 revolver

Revolver

A revolver is a repeating firearm that has a cylinder containing multiple chambers and at least one barrel for firing. The first revolver ever made was built by Elisha Collier in 1818. The percussion cap revolver was invented by Samuel Colt in 1836. This weapon became known as the Colt Paterson...

s were the official sidearm

Service pistol

A service pistol is any handgun issued to military personnel.Typically service pistols are revolvers or semi-automatic pistols issued to officers, non-commissioned officers and rear-echelon support personnel for self defense, though service pistols may also be issued to special forces as a backup...

 of both the British Army and the North-West Mounted Police

Royal Canadian Mounted Police

The Royal Canadian Mounted Police , literally ‘Royal Gendarmerie of Canada’; colloquially known as The Mounties, and internally as ‘The Force’) is the national police force of Canada, and one of the most recognized of its kind in the world. It is unique in the world as a national, federal,...

—as well as being issued to many other Colonial units throughout the British Empire

British Empire

The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom. It originated with the overseas colonies and trading posts established by England in the late 16th and early 17th centuries. At its height, it was the...

—and the later model .38/200 Enfield No.