R3-M3 was an R3-series astromech droid which served the Galactic Empire aboard the first Death Star. He was most likely destroyed along with the space station over the planet Yavin. R5-C7 was an R5-series astromech droid. During the Clone Wars, he resided on Tatooine.
R3-M3, R5-C7, (The, Legacy, Collection), Build-A-Droid, Wave