Yes, the Churczish had a minigun tank. Why are you surprised? It was made mostly as an infantry support vehicle armed with mostly HE (High Explosive) and AMB (Anti-matter burst) shells, though it could carry APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) shells for anti-tanks use. I would be lying if I said that I didn't take inspiration from the Maus...
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