The F90A Gundam F90 Assault Type is one of the many mission packs developed for the F90 Gundam F90 by the Strategic Naval Research Institute. The Gundam F90 Assault Type is designed for extended travelling and combat operations. It is capable of infiltrating deep into enemy territory and then launch pinpoint attacks on critical facilities. The A-Type has flight capabilities thanks to the two backpack-mounted mobile units equipped with the Minovsky Craft system, as well as the large capacity propellant tanks on the forearms and legs. When flying, both shoulders are fixed to enhance flight stability and the AMBAC is controlled via the legs. Although it is supposed to surpass the F91 Gundam F91 in terms of speed, there are concerns about its defensive capabilities.
The Gundam F90A Assault Type underwent field testing in U.C 120, and it was stationed on Ra Cailum-class Admiral Tianem as part of the 13th Experimental Battle Group. Its pilot was Def Stallion, an employer of the Strategic Naval Research Institute. The Admiral Tianem came into conflict with the Mars Zeon during a test flight near Side 4 on October 28.