ZK-383
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The ZK-383 is a submachine gun developed by the Koucký brothers, who worked at the pre-war Československá zbrojovka, akc.spol. arms factory in Brno, Czechoslovakia. It was produced at a slow rate from 1938 onwards and was exported as far away as... Wikipedia
Cartridge: 9×19mm Parabellum
Effective firing range: 250 m
No. built: Approx 35,000
Place of origin: Czechoslovakia
Produced: 1938–1948
Rate of fire: 500–700 rounds/min, variable