Guns › Hispano-Suiza HS.404Hispano-Suiza HS.404Hispano-Suiza HS.404Hispano-Suiza HS.404Modification ofHispano-Suiza HS.404Caliber20 mmService193119321933193419351936193719381939194019411942194319441945France · Western Europe≈ 10 May 1940 – Jun 1940Aircraft 1193119321933193419351936193719381939194019411942194319441945Potez 631≈ 10 May 1940 – Jun 1940