The M53/59 Praga is a Czechoslovak self-propelled anti-aircraft gun developed in the late 1950s. It consists of a heavily modified Praga Praga V3S six-wheel drive truck chassis, armed with a twin AA autocannon mounted on the rear for which the vehicle typically carries 900 rounds of ammunition, each gun being gravity fed from distinctive 50 round magazines. (
wiki)
Note:
6mm and 1/144 variant is contain 2 pieces by default
Pack of 6