Krupp K5
The Krupp K5 was a heavy railway gun used by Nazi Germany throughout World War II. == Description == Krupp's K5 series were consistent in mounting a 21.5-metre-long (71 ft) gun barrel in a fixed mounting with only adjustable vertical elevation of the weapon. This gondola was then mounted on a pair of 12-wheel bogies designed to be operated on commercial and military rails built to German standards.