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.