ZPU anti-aircraft – Walk Around

В ZPU (Russian: зенитная пулемётная установка, meaning “anti-aircraft machine gun mount”) is a family of towed anti-aircraft gun based on the Soviet 14.5×114mm KPV heavy machine gun. It entered service with the Soviet Union in 1949 and is used by over 50 countries worldwide. Quadruple (ZPU-4), double- (ZPU-2 and ZU-2) and single-barreled (ZPU-1) versions of the weapon exist.

Джерело: ZPU anti-aircraft on Wikipedia