Mauser MP-57
Encyclopedia
The MP-57 was a submachine gun manufactured by Mauser
Mauser
Mauser was a German arms manufacturer of a line of bolt-action rifles and pistols from the 1870s to 1995. Mauser designs were built for the German armed forces...

 after the Second World War for the then newly established Bundeswehr
Bundeswehr
The Bundeswehr consists of the unified armed forces of Germany and their civil administration and procurement authorities...

. It was chambered in the 9x19mm round and fed from a magazine inserted in the pistol grip.
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