The Rhm. Skorpion (G), probably one of the best tier VIII tank destroyers in the game.
This model is from the game World of Tanks (get the game here: www.worldoftanks.com)
Please be aware that I recommend printing using a dissolvable support material (e.g. HIPS filment), by setting the 2nd extruder as support generation. This is because the tank is an open-topped tank so all of the detail in the gun will be covered by supports.
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Happy Printing!