The M163 Vulcan is a self-propelled anti-aircraft weapon system developed by the United States during the 1960s. It features a 20mm M61 Vulcan rotary cannon, capable of firing at a high rate to target low-flying aircraft. The system is mounted on a modified M113 armored personnel carrier, providing mobility and protection for its crew. Designed primarily for air defense, the M163 Vulcan can engage various aerial threats, including helicopters and drones. It has been used by several countries and has seen service in various conflicts, showcasing its effectiveness in protecting ground forces from aerial attacks.