Usually you will not be KoS for having Nomad equipment- however, Rheinland is an exception because they are dealing with Das Wilde right now, as well as being heavily hurt by the Nomads during the war. As far as I can tell, they tolerate experimentation with Nomad technology about as well as they tolerate other religions (this springs to mind) and will either ask for you to dock, unmount the Nomad equipment, and hand it over for destruction, or simply kill you to get it destroyed if you refuse. Other militaries will often shadow you or confiscate the equipment for their own research before shooting you. Nomad technology is powerful stuff, house militaries don't exactly like how everyone and their dog has better technology than the military.