The Stug 4 was introduced in 1943. It has a PZ IV chassis with a modified Stug III superstructure attached. The majority of these were issued as companies to infantry divisions. 1139 were produced between Dec of 1943 to March of 1945. Stug IV (Sd.Kfz.167) was armed with the 75mm StuK 40 L/48 gun. This model has the cast 'saukopf' mantlet.
This model is ready to drop into your scene. A Scene file and all textures are included. The model will look like the one rendered.