It was a light anti-aircraft gun used by Germany in World War II. Designed by Rheinmetall, it is an improved model of FLAK30 to improve the rate of fire. The design began in the late 1930 s, and in 1939 it was accepted as the standard anti-aircraft gun for the German Army and was used extensively throughout the war. Used as a single-barrel towed gun, it was also installed on a variety of vehicles and fixed positions, including a quadruple-mounted version, which greatly enhanced anti-aircraft fire. Because of its excellent performance and high rate of fire, it became a nightmare for the Allied Air Force.

The 88mm anti-aircraft gun is a medium caliber anti-aircraft gun designed and tested by the world-renowned artillery manufacturer Krupp subsidiary in Germany. After completing on-site testing, it entered service in 1933 and also possessed particularly strong anti tank capabilities. This gun was the most successful artillery system used during World War II, a highly successful medium caliber anti-aircraft gun that gave it a high firing rate. After Hitler finally freed himself from the constraints of the arms limitation treaty, the 88mm anti-aircraft gun was immediately adopted by the German Air Force (whose air defense forces were under its jurisdiction) as the standard equipment for medium caliber anti-aircraft guns.

The 3.7-inch mobile anti-aircraft gun from World War II is now located next to HMS Ocelot at the Chatham Historical Shipyard in Kent. This gun was used by British artillery to defend the town of Medway.