161/3), nicknamed Möbelwagen ("Moving Van") because of its boxy shape, was a self-propelled anti-aircraft gun built from the chassis of the Panzer IV tank.

In 1943, due to the waning ability of the Luftwaffe to combat enemy ground-attack aircraft, ground-based anti-aircraft weaponry was becoming increasingly important to the Wehrmacht.

The prototype displayed to Hitler on December 7, 1943, used the 2 cm Flakvierling 38, which was deemed too weak for the latest aircraft, which were constantly being improved to fly higher and faster.

These plates had two operating positions: they could be lowered for full 360 degree traverse, allowing flat or low-level firing, or they could be half-closed, being pinned together to hang slightly open.

Only 240 were produced, and it was eventually succeeded by the first true Flakpanzers: Wirbelwind and Ostwind, both of which provided the crew with improved armored protection and full rotation when firing at either ground or air targets.