Captured examples
The Wehrmacht used a number of Bofors guns which had been captured in Poland and France. The Kriegsmarine also operated some guns obtained from Norway.
In German naval use, the gun was designated the "4 cm Flak 28", and was used aboard the cruisers Admiral Hipper and Prinz Eugen toward the end of the war.[6] Beginning in 1942, several E-boats were equipped with the Flak 28 to enable them to fight against British MGBs and MTBs on equal terms.
Japan captured a number of Bofors guns in Singapore and put them into production as the Type 5.
Both Japan and West Germany continued to use the Bofors gun throughout the Cold War. The Federal German navy used it in destroyers, frigates, and fast patrol boats until 1984, in minesweepers to the present day.