This is the crane add on to Panzer Concepts kit of the Gamma-Gërat for those who want to show the gun being assembled:
The crane will also be available as a stand alone kit for use in rail yard scenes or other support/Maintenance roles.
That thing is very cool. I’m liking all these rail subjects they’re putting out.
Seems there has been some misunderstanding with this model, although it can be purchased separately, it is a companion for Panzer Concetps Gamma-Gerät kit:
More information on it here