Used in World War II and designed by Krupp to replace the Paris Gun was used in World War I, the 21cm Kanone 12 Eisenbahnlafette was developed between 1935 and 1938. The gun was mounted between two trucks and had a hydropneumatic recoil system. To transport the weapon was disconnected from your system and how the recoil of the gun barrel was too long he needed external support to not bend with their weight. The first gun was finished in 1938 and was delivered to the German Army in March Two guns these models were built, the K 12 N (E) and K 12 V (E). The weapons went to war with the Artillerie-Batterie 701 along the French coast in the Channel.

Specifications 21cm K 12 V (E)

Weight: 302 tonnes
Length: 41.3 meters
Barrel length: 33.3 meters
Size: 21 cm
Elevation: 25 – 55
Initial velocity of the projectile: 1.500 meters per second
Effective Range: 45,000 meters
Maximum capacity: 115,000 meters