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

The Gustav gun was a gun about 12 meters high, 47 meters long, weighing 1,350 tonnes and was firing 10 tonnes shells through a 30 meters long pipe. 22 people could sit aligned on the barrel of the gun.

Steam Workshop::Schwerer Gustav

Was the Gustav gun successful, and was it destroyed? If it was, how? - Quora

Schwerer Gustav: The World's Biggest Gun Ever Built

Schwerer Gustav: The World's Biggest Gun Ever Built

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

Steam Workshop::Schwerer Gustav

Schwerer Gustav: Largest Gun Mankind Has Ever Built

Schwerer Gustav: Biggest Gun Ever Used in Combat

The Nazis' Schwerer Gustav Railway Gun, The Biggest Gun Ever Built

The Heavy Gustav, Hitler and generals inspecting the largest caliber rifled weapon ever used in combat, 1941 - Rare Historical Photos

Schwerer Gustav: Hitlers Enormous Gun

World War Two Weapons That Flopped – Brewminate: A Bold Blend of News and Ideas

How powerful was the 800mm Gustav gun? - Quora

Schwerer Gustav: The World's Biggest Gun Ever Built