German Railgun - Zarco Macross

Schwerer Gustav, Homeanimations tanks (English) Wiki

Rail Cannon 80 cm (E) Schwerer Gustav (Dora), Military Wiki

Canon de 274 modèle 87/93 Glissement - Wikipedia

Schwerer Gustav Wiki

JF Ptak Science Books: Big, Big Guns (Real and Imagined)

Krupp K5 - Wikipedia

Largest gun that will fit on a tank

IS-6 Monster, Homeanimations tanks (English) Wiki

Could a Nazi Super Gun change the tide of war in Soviet and quickly destroy UK to avoid entry of US in WW2 which led to two front wars? - Quora

Schwerer Gustav railway cannon made using Create: Big Cannons. This took a lot of accidentally blowing up my build to make, enjoy. : r/feedthebeast