The Fusil Automatique Léger ("Light Automatic Rifle") or FAL is a semi-automatic/selective fire battle rifle produced by the Belgian armaments manufacturer Fabrique Nationale de Herstal (FN). During the Cold War it was adopted by many North Atlantic Treaty Organization (NATO) countries, with the notable exception of the United States. It is one of the most widely used rifles in history, having been used by more than 90 countries.
The FAL was predominantly chambered for the 7.62×51mm NATO round (although originally designed for the .280 British intermediate cartridge) and because of its prevalence and widespread use among the armed forces of many NATO countries during the Cold War it was nicknamed "The right arm of the Free World".
A British Commonwealth derivative of the FN FAL has been produced under licence as the L1A1 Self-Loading Rifle.
In 1946, the first FN FAL prototype was completed. It was designed to fire the intermediate 7.92×33mm Kurz cartridge developed and used by the forces of Nazi Germany during World War II (see StG44 assault rifle). After testing this prototype in 1948, the British Army urged FN to build additional prototypes, including one in bullpup configuration, chambered for their new .280 British caliber intermediate cartridge. After evaluating the single bullpup prototype, FN decided to return instead to their original, conventional design for future production.