Sphinx Systems Limited was a Swiss-based manufacturer of high quality pistols used mainly by special forces, elite police units and sports shooters. Sphinx was founded in 1976, specializing in tooling and machining, and then diversified into the firearms industry during the 1980s. Sphinx is best known for its development work on the original Czech-designed CZ 75 pistol, which evolved into the Sphinx 2000, Sphinx 3000 custom competition pistol, and Sphinx SDP Compact. Sphinx went out of business in July 2016.

The CZ 75 is a semi-automatic pistol made by Czech firearm manufacturer ČZUB. First introduced in 1975, it is one of the original "wonder nines" and features a staggered-column magazine, all-steel construction, and a hammer forged barrel. It is widely distributed throughout the world and is the most common handgun in the Czech Republic.