ZiS2
ZiS-2, also known as the 25 mm ZiS-2, was a Soviet anti-aircraft gun developed during World War II. It was designed to provide effective air defense for ground forces and was widely used by the Soviet Union and its allies. The ZiS-2 was a 25 mm cannon with a high rate of fire, capable of firing up to 300 rounds per minute. It was mounted on various vehicles, including tanks, self-propelled guns, and armored personnel carriers, as well as on stationary mounts. The gun was known for its reliability and effectiveness in combat, contributing significantly to the Soviet Union's air defense during the war. The ZiS-2 was also exported to several countries after the war, including China, North Korea, and various Eastern Bloc nations. Despite its age, the ZiS-2 remains a popular choice for air defense systems in many countries due to its simplicity, reliability, and effectiveness.