ISBN: | 978-5-5085-3557-5 |
High Quality Content by WIKIPEDIA articles! The ZU-23-2 "Sergey", also known as ZU-23, is a Soviet towed 23 mm anti-aircraft twin-barreled autocannon. ZU stands for Zenitnaya Ustanovka (Russian: Зенитная Установка) - anti-aircraft mount. The GRAU index is 2A13.