R3-M3 was an R3-series astromech droid which served the Galactic Empire aboard the first Death Star.
He is the only LEGO Astromech Droid minifigure to have sky-blue body and leg pieces. Additionally, he is one of only two LEGO Astromechs belonging to the empire to have a color other than black. (R2-Q2 is pearl gray). His dome is clear with blue printing.