This is a now quite rare deactivated Czechoslovak ZK383 9mm sub-machine gun. It is an early deactivation. The certificate that comes with it is dated 4.9.1989.This particular gun was issued to the Venezuelan army. The ZK383 was designed by the Koucky brothers at the Brno factory and was introduced in 1938.It was a very high quality gun made from accurate quality castings and machined to fine tolerances. Its high manufacturing costs was one of the reasons for its discontinuation. The weapon was renowned for its accuracy. It had selective fire capability from single shot to full auto by simply pushing the selective fire lever either forward or backwards. The original barrel was simply removed by pulling back a spring loaded catch behind the fore sight and twisting the barrel which released it. The magazine capacity was 30 rounds. When the Brno factory fell into German hands during World War 2 they continued production and issued the weapon to their SS divisions. The weapon was used by the Brazilian army as late as 1966.