The Flieger MG 29 (also called the Flab MG or FLab MG 29/38) was a Swiss light machine gun developed in the 1920s and produced until shortly before the dawn of the Second World War. It was mounted on aircraft and was later used as an anti-aircraft gun. However, it was too heavy to be used as am infantry support weapon. It employed a closed bolt system. Some guns had the ability to bolt a large box onto the bottom of the machine gun to hold the ammunition belt.