Utopian projection never having existed ... although similar assemblies on chassis of Tiger I and Tiger II were studied. This cannon was originally a railway cannon which by nature could only be used on the existing rail track and dependent on it for pointing. Its use was therefore limited. Mounting the barrel on two heavy tank chassis offered greater amplitude of movement and use. However due to the enormous weight to be supported by the two tracked hulls, the displacement capacities remained limited in terms of speed, range and all-terrain capacities, not to mention the wear of the mechanical components. It is likely that most of the travels would have been made by rail (the gun mounted on railway bogies), the gun being only deposited on its tracked platforms (transported separately on other wagons) as close as possible to its firing zone .