The Flakpanzer IV "Ostwind II" is an up-gunned modification of the Flakpanzer IV "Ostwind", which is the second variant of the Flakpanzer IV self-propelled anti-aircraft gun family. To increase the firing rate, the Flakpanzer IV "Ostwind" was redesigned with two 37 mm Flugzeugabwehrkanone 43 cannons. A single prototype was built, but World War II ended before it could be fully completed.

Introduced in Update 1.91 "Night Vision", the Flakpanzer IV "Ostwind II" is an improvement over its predecessors. The increased firepower is useful against aircraft that are much faster in its rank. Due to the sheer destructive power of the ammunition, most enemy aircraft can be brought down with a single hit. The platform, however, remains lightly armoured and should only be used to engage enemy ground units if absolutely necessary.