Developed late into the One Year War as part of the United Maintenance Plan, the Rick Dom II was an improved model of the MS-09R Rick Dom. Unlike its predecessor, which was based on the ground-use MS-09 Dom, the Rick Dom II was designed from the ground up with space-use in mind, and thus did not take aerodynamics into account. Its armor was redesigned to use a more planar structure, which made it possible to install a more powerful generator and thrusters with higher output.

In addition, it was equipped with more vernier thrusters for increased mobility, and a pair of propellant tanks for increased operating time. Technology from the MS-14 Gelgoog was also incorporated into its design. Compared to its predecessor, its production was simplified, and its durability was enhanced. The use of the second stage production type cockpit improved ease of use, lessening the burden placed on the pilot. Despite being specialized for space use, it can also operate within the atmosphere or inside colonies with modifications.

Originally, the Rick Dom II was planned to be assigned to various locations after full mass production begins. However, since the One Year War ended before this could happen, only a very small number of units participated in actual combat. Its final production number, including unassembled parts, was unknown.

On December 13, U.C. 0079, a Zeon mobile suit team, including at least one Rick Dom II, entered the Side 6 colony of Ribo and engaged in combat with the Federation garrison's RGM-79G GM Command before retreating. On December 14, Zeon launched another attack on the colony, where a mobile suit team, once again including at least one Rick Dom II, engaged the Federation's RGM-79GS GM Command Space Type outside Ribo, allowing the shuttle piloted by Zeon soldier Bernard Wiseman to enter the colony during the chaos as part of Operation Rubicon.

Another unit was piloted by Guy Helmuth of Zeon's Marchosias Corps and carried a large heat saber for close range combat. Guy and his Rick Dom II would participate in the Battle of Solomon and the Battle of A Baoa Qu.

During the Delaz Conflict of U.C. 0083, the Delaz Fleet operated a large number of Rick Dom II.These units would participate in the attack on the Federation naval review and the colony drop on Earth.