Ultimate Soldier Sturmpanzer "Brummbar" 1/32 Scale

The Sturmpanzer (unofficial Brummbar, may have been from a model company) was built on a panzer mk IV chassis. The Mk IV being a moderate sized tank. A superstructure was put on the chassis making it into the size of a motorhome. The idea to put a 150mm short barreled gun which is large for an armored vehicle. It fired a high explosive round that was very high explosive. The shorter the barrel the more high explosive the round could be due to the friction caused by the barrel. But then accuracy decreased with a short barrel. Thus a highly armored vehicle to blow up bunkers and such.
This model has opening hatches, removable side skirts, moveable tracks and many fine details along with 2 German soldiers which are nice for showing scale. The model was originally released in 2005.