ZSU-23-4 “Shilka”

The ZSU-23-4 Shilka is a Soviet self-propelled anti-aircraft system. I thought the Shilka was an old piece of Cold War kit, but it turns out that, while it may be old, many countries have developed upgrade packs and are still using it. The ZSU-23-4 (Zenitnaya Samokhodnaya Ustanovka...