The ZSU-23-2 anti-aircraft gun system comprises twin 23mm cannons on a towed two-wheel carriage. The cannons are mounted side-by-side between large ring-type trunions. The system resembles the 14.5mm ZPU-2, however the shape and placement of the ammunition boxes (at right angles to the gun carriage) and the prominent muzzle flash suppressers are its distinguishing features. The ZSU-23-2 is a highly mobile, air-droppable weapon. It has an effective anti-aircraft range of 2500 meters. The system is also effective against lightly armoured vehicles.
In the firing position, the ZSU-23-2 anti-aircraft gun system is levelled by jacks and stabilized on a three-point base. It uses an optical mechanical computing sight for A-A fire and a straight-tube telescope for ground targets. The crew can fire the gun from the traveling position during emergencies. On the towed system, ammunition is fed from box magazines mounted on the outside of each trunion. Reloading is fast and uncomplicated and the magazines are accessible easily. The beginning link of the new belt attaches to the link of the last old cartridge. This last cartridge automatically interrupts the firing cycle when it reaches the feed way and signals the bolt to remain open.
