AT-T is Soviet era heavy artillery prime mover. It was produced in 1949-1979 and still used as main vehicle in hard condition of Siberia and Russian Polar area. It has capacity 5 ton and able to tow 25 ton weight. AT-T was designed to tow large and super-large calibre artillery systems, also as intercontinental ballistic missiles. Aside Soviet Army it was used in national economy and polar expeditions, both Arctic and Antarctic.
The model can be used as open body vehicle, just delete unwanted elements. This also reduce number of polygons, approximately 10K less. See pics for open/closed body variants.
The model is real-world scaled and hierarchically linked. All objects and materials use corresponding unique names.