I have the rights.
To get the rights to it you have to talk to Hardcase about since he never gave up the rights to the name.
If a regiment fails, the leader still owns the rights to the name.
If you talked to Hardcase, then you have the rights to the name. I doubt you even could talk to hardcase since he changed his steam name and cut off all ties to the NAS community.
You can't just say "I have the rights" and get the rights to the name.