Late during the One Year War, the Principality of Zeon military launched its "United Maintenance Plan" to upgrade and improve existing mobile suit designs and to make its own manufacturing capabilities more streamlined by incorporating similar parts and systems in several different mobile suit lines. This plan also served to help mobile suit pilots easily make the transition from one type of mobile suit to another, as all of the MSs produced under the United Maintenance Plan would be similar to each other in terms of operation. One of the mobile suit types to be redesigned under this plan was the MS-09R Rick Dom, the spaceborne variant of Zimmad Company's original groundpounding MS-09 Dom, which had been in service for only a few months. The high performance and success of the Rick Dom inspired the Zeon military to improve the design even further, creating the MS-09RII Rick Dom II. The primary improvement was an increase in its overall thruster acceleration and the addition of more attitude control verniers for added maneuverability. The increased thrust and fuel consumption was offset by the addition of a pair of external propellant tanks, allowing it to operate in the field for longer periods of time. However, due to its late introduction into the war, only a small number of Rick Dom IIs were produced, some operating in the skirmishes against the Earth Federation Forces stationed in the Side 6 area in December UC 0079. A few Rick Dom IIs did survive the war and made their way into the service of the Delaz Fleet, although these Rick Dom IIs seem to have been downgraded in terms of number of thrusters and acceleration (possibly due to the unavailability of replacement parts).

Appearances: Mobile Suit Gundam 0080: War in the Pocket; Mobile Suit Gundam: Outer Gundam; Gundam Tactics Mobility Fleet 0079; Mobile Suit Gundam: Encounters in Space
Original mechanical designer: Yutaka Izubuchi