What cartridge, also known as 9 mm Luger by the C.I.P. or 9 mm NATO by NATO, is used in the submachine gun the MP 40?
MP 40 The MP 40 ("Maschinenpistole 40") was a submachine gun chambered for the 9×19mm Parabellum cartridge. It was developed in Nazi Germany and used extensively by the Axis powers during the Second World War.
Mendoza HM-3 The HM-3 is a submachine gun of Mexican origin chambered in the 9mm calibre and, since 2011, in .380 ACP caliber for private security forces, from a magazine fed from the grip, much like the Uzi.