The ZK-383 is a submachine gun developed by the Koucký brothers, who worked at the pre-war Československá zbrojovka, akc.spol.

The production of the ZK-383 continued at Brno arms factory even during the German occupation during World War II.

[1] The ZK-383 was originally designed to be a squad automatic weapon much like the British Bren and Soviet DP27, despite it shooting a pistol round and not a full sized rifle cartridge.

Military versions possessed detachable barrels, an integrated bipod, and rifle type sights, components considered unusual in submachineguns of the era.

[3] The police variant, designated the ZK-383-P, lacked these features, as did the postwar ZK-383-H.[1] The ZK-383 was fitted with a quickly detachable barrel.