ZU-23-2 Russian anti-aircraft gun
Eastern Express 35135

The ZU-23-2 "Sergey", also known as ZU-23, is a Soviet towed 23 mm anti-aircraft twin-barreled autocannon. The ZU-23-2 was developed in the late 1950s. It was designed to engage low-flying targets at a range of 2.5 km as well as armoured vehicles at a range of 2 km and for direct defense of troops and strategic locations against air assault usually conducted by helicopters and low-flying airplanes. In the Soviet Union, some 140 000 units were produced. The ZU-23 has also been produced under licence by Bulgaria, Poland, Egypt and the People's Republic of China. [Wikipedia]