The NRX-055 Baund Doc is a transformable mobile armor introduced in the Mobile Suit Zeta Gundam anime. Pilots included Rosamia Badam, Gates Capa, and Jerid Messa.

Despite its apparent size and bulk, the Baund Doc's Mobile Armor mode was very fast and maneuverable thanks to multiple vernier thrusters and apogee motors. The Baund Doc can transform into an asymmetrical Mobile Suit mode, and this transformable mobile armor's armament consisted of a beam rifle, beam saber, a powerful diffuse mega particle cannon, arm claw and two leg claws. The Baund Doc was also equipped with a Psycommu System, which allowed its pilot to directly interface with the machine's operating system. Although normal human pilots could operate the Baund Doc, its true potential only came out in the hands of a Newtype or a Cyber Newtype. Three Baund Docs were built, although only the first one, the NRX-055-1 had a specially-designed cockpit that could seat two individuals, the pilot and an instructor. The second and third units were essentially the same, except they were built with standard single-person cockpits and sported highly distinctive color schemes of blue, yellow and pink.