The Browning Hi-Power is a single-action, 9 mm semi-automatic

Semi-automatic firearm

A semi-automatic, or self-loading firearm is a weapon which performs all steps necessary to prepare the weapon to fire again after firing—assuming cartridges remain in the weapon's feed device or magazine...

 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 ....

. It is based on a design by American firearms inventor John Browning

John Browning

John Moses Browning , born in Ogden, Utah, was an American firearms designer who developed many varieties of military and civilian firearms, cartridges, and gun mechanisms, many of which are still in use around the world...

, and completed by Dieudonné Saive

Dieudonne Saive

Dieudonné Joseph Saive was a Belgian small arms designer who designed the FN Model 1949 and the FN FAL. He became the head firearms developer of Fabrique Nationale after the death of John Browning. After John Browning's death, Saive continued with several projects for modernizing and improving...

 at Fabrique Nationale

Fabrique Nationale de Herstal

Fabrique Nationale d'Herstal — self identified as FN Herstal and often referred to as Fabrique Nationale or simply FN — is a firearms manufacturer located in Herstal, Belgium....

(FN) of Herstal

Herstal

Herstal, formerly known as Heristal, or Héristal, is a municipality of Belgium. It lies in the country's Walloon Region and Province of Liege along the Meuse river. Herstal is included in the "Greater Liège" agglomeration, which counts about 600,000 inhabitants...

, Belgium

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

. Browning died in 1926, several years before the design was finalized. The Hi-Power is one of the most widely used military pistols of all time, having been used by the armed forces of over 50 countries.

The Hi-Power name alluded to the 13-round magazine capacity; almost twice that of contemporary designs such as the Luger or Mauser 1910.