The MSM-07s is an upgraded version of the Z'gok amphibious mobile suit. The one depicted here is the unit assigned to Char Aznable during his aborted raid on the Federation's underground headquarters at Jaburo.

The 07s appears externally identical to the standard 07 version but has increased speed and reactions. It was intended to be used by ace pilots who would be able to make the best use of the suit's enchanced capabilities.

Although exact numbers are uncertain, it is estimated that fewer than 30 of these MS were built. They were the most advanced amphibious MS of the One Year War.