The video here shows the most deadly and largest guns ever used in a combat. The guns were designed by Krupp to be used in World War II. One of these guns was used by Hitler as the gun could pierce a meter of stell, seven meters of concrete, or thirty meters of dense earth. The gun had a huge structure and was too heavy so it took two rail railways to mount this gun. The gun was too heavy place on a rotating table so a curved track was used to aim a target and break it into pieces using an armor piercing shell three meters long, 7100 kg in weight the propellant casing alone measured 1.3 meters.
Via: spluch
