Solved 2. (5 points) According to Wikipedia, Schwerer

How powerful was the 800mm Gustav gun? - Quora

Trivia: Gustav Max was based on Schwerer Gustav, the rail cannon made and used by the nazi germany, also considered the largest gun ever used in a war. : r/DuelLinks

Schwerer Mörserpanzer, The Wolfenstein Fanon Wiki

Schwerer Gustav

The Powder Toy - Schwerer Gustav Rail gun by AviatorGuy

What is the heaviest projectile ever successfully used in battle

File:ЦМ ВОВ. Железнодорожный артилерийский транспортер ТМ-1-180

MilitaryHistoria - Schwerer Gustav was a German 80-centimetre

Schwerer Gustav - Hitler's giant gun - How it worked and why it turned out to be a disaster

A Shell and a Cartridge of the Schwerer Gustav Rail-Canon from WW2 in the Military Museum in Dresden. - 9GAG