I was just reading a book on "German Secret Weapons", and came across the "Maus". I guess it was suppose to dwarfed the Tiger II. The Tiger II weighed 156,747 lbs. and the "Maus" weighed 425,488 lbs. It's main gun was a 15cm KwK 44, it's secondary weapon was to have been the 7.5cm gun (Panther's main gun). Also it had 2x 7.92mm MG 34 machine guns on it.

What else does anyone know about it?