Weapon as obtained from the Wikipedia: The 5 cm PaK 38 (L/60) ( 5 cm Panzerabwehrkanone 38 (L/60) ) was a German   anti-tank gun of 50 mm calibre . It was developed in 1938 by Rheinmetall-Borsig AG as a successor to the 37 mm PaK 36 , and was in turn followed by the