The AMS-123X-X Moon Gundam is the titular mobile suit of Mobile Suit Moon Gundam. It is piloted by Jutta Qasim.

The AMS-123X-X Moon Gundam is the AMS-123X Varguil equipped with a Gundam-type head and repainted in tricolor scheme. Additionally, the backpack's funnel rack has been completely removed and a sub-arm has been added to mount the Psycho Plates. The Psycho Plates is a Psycommu armament that drifted to Moon Moon along with the head.