|Country of origin||
Josef and František Koucký
Blowback, open bolt
12.5 inches (31.7 centimeters) with stock collapsed
4.9 pounds (2.2 kilograms)
20-round detachable box magazine
The ZK 476 is a prototype Czech submachine gun.
The ZK 476 was designed by brothers Josef and František Koucký in 1946 until around 1948. The weapon failed to enter service, but the technology used in the ZK 476 lives on in the Uzi.
The ZK 476 fired from an open bolt; the bolt was telescoping and wrapped over the barrel, very similar to the later Uzi.