It is an anti-aircraft gun used by Germany during World War II and belongs to the FLAK series. It is an improvement on the earlier 37mm anti-aircraft gun, designed to improve the rate of fire and simplify the production process. The design makes it effective against low-flying enemy aircraft. The design uses lighter materials and improved construction to make it more flexible in combat. It can rotate 360 degrees, and the vertical shooting angle ranges from -7 ° to 90 °, which is suitable for various combat environments. It is used for air defense operations and can also be used as ground fire support when necessary. It was widely deployed in the German air defense forces and played an important role in many battlefields.