The FN FNC (French: Fabrique Nationale Carabine) is a 5.56×45mm NATO assault rifle developed by the Belgian arms manufacturer FN Herstal and introduced in the late 1970s.
The rifle was developed between 1975–1977 for NATO standardization trials. The rifle’s design is based on the FNC 76 prototype, which itself originated from the commercially unsuccessful FN CAL rifle. This prototype was soon withdrawn from the NATO competition after performing poorly due to its rushed development. Later trials for the Swedish Armed Forces held between 1981–1982 using updated prototypes proved the utility and efficiency of the design, impressing both the Swedish military and Belgian Army staff back at home. The FNC was finally adopted by the Belgian Armed Forces in 1989, as a service-wide replacement for the 7.62×51mm NATO FN FAL, after having been issued in small numbers to airborne infantry units for several years.
Indonesia purchased approximately 10,000 rifles in 1982 for its air force, and later acquired a license to manufacture these rifles for all branches of the armed forces. These are built by the Indonesian firm PT Pindad as the Pindad SS1 and Pindad SS2. A version of the FNC adapted for arctic conditions was adopted in 1986 as the standard service rifle of the Swedish Armed Forces (with the designation Ak 5) and is used in relatively small numbers by a number of other armies and police organizations.