Mitrailleuse d'Avion Browning - F.N. Calibre 13,2 mm

The Mitrailleuse d'Avion Browning - F.N. Calibre 13,2 mm is a 13.2mm heavy machine gun for aircraft use, designed in 1938 by Fabrique Nationale of Herstal, Belgium as a private export venture in the years before the Second World War. Germany's 1940 invasion of Belgium cut off further export sales, but Sweden and Romania had already received Belgian-built examples, and Finland later produced an unlicensed version with Swedish assistance. It served with Sweden's air force in front-line use from 1939 to 1957 and remained in practice use there until 2007. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/