Question: can an uchiha get rinnegan?
Answer: so i believe that the Rinnegan can only be awakened in an Uchiha if they have Indra's chakra and Asura's chakra or Indra's chakra and six paths chakra. If a Senju or Uzumaki were to inherit the Rinnegan they'd have to have Asura's Chakra and steal an Uchiha's eyes with Indras Chakra to gain Rinnegan.