To further supplement the supply of StuGs, Germany fielded...

To further supplement the supply of StuGs, Germany fielded hybrids of vehicles based on the Sturmgeschütz III Ausf.G gun and superstructure mounted on a Panzerkampfwagen IV Ausf.H or J chassis, this was designated the Sturmgeschütz IV.  Seen here is the earlier version with the folding shield for the loader’s MG34 on the superstructure roof and the early drum style muffler.