The MS-06R, which was developed to increase the speed and mobility of Zaku, is subject to branch number approval due to the introduction of a local repair kit, which seems to have been carried out by each unit after the actual battle deployment. There are quite a few), but the most important example of the refurbishment is probably the refurbishment of the fuel tank of the leg rocket motor so that it can be separated and loaded. When using the R-type operation, Musai-type cruisers and Valkyrie-class armored aircraft carriers with dedicated supply equipment were used as supply mother ships. However, there was no Principality of Zeon after the Battle of Ruum in a situation where it can be said that only pilots have the skill to efficiently operate the R type, which consumes a large amount of fuel. Therefore, a redesign was carried out by changing the leg fuel tank, which consumes the most, to a replacement method. This specification is applied to all the additional productions prepared on the production line after the completion of 22 initial productions, and more than 10 of the initial productions have undergone similar repairs later. As a result, the aircraft with this specification was given the approval number of MS-06R-1A to distinguish it from the initial production R type. The platoons that included or were organized into R-types were always accompanied by F-type Zaku for replenishment work in the operational space.
In line with these, the aircraft from the R-1A specification has a thread for pilot recovery in an emergency built into the control area itself.
Lieutenant Gaia, Lieutenant Mash, and Lieutenant Ortega, who are called the Black Tri-Stars in the special platoon with the 1st MS Battalion Command of the 7th Division of the Assault Mobile Army, which was famous as a skilled pilot of mobile suits from the Guidance Mobile Battalion when the General Army was established, are also the above MS. -06R-1A is used. Their favorite jet stream attack attack formation has produced a lot of results. In addition, it is said that this team is the only R-type machine that has a basic paint based on black in a personal color.