Yes, a StuG(Assault Gun) is like a JagdTiger or JagdPanther in that it's a cannon mounted in a bullt-up superstructure without a turret ... The WWII Germans and to a lesser extent the USSR, were "famous" for this type of AFV. The German Hummel and Vespa for example mounted Howitzers for indirect FA support ... Where, for example, the Nashorn, Elefant and Marders mounted high velocity cannons primarily for direct fire at AT targets ... The Germans also mounted lower velocity cannons in StuG Assault Gun type configurations, like the early StuG Mk.IIIs and IVs and the Brumrbar ... For close support Infantry tasks ... Here's the GHQ link for WWII German AFVs ... it pretty much cover all of the major SPFA, SPAT, StuGs, etc. that were used during that period -
http://www.ghqmodels.com/store/world-wa ... erman.html ... gives you a pretty good idea of what we are talking about ...