How do i say this... MISSILES ARE ALLIED TECH!
Honestly i dont think you got a bad idea there, but if the model is a mere resize i dont hink it will be good. There was a soviet Frigare somewhere, look for it it might fit better your needs.
As for the space this unit occupies, i am using something similar to a kirov in my project, but its not all powerful, its more of an air support for the Kirov.