I tried to recreate a mobile suit from M-MSV using the Revive Hyaku Shiki.
The "FA-100S Full Armor Hyaku Shiki Kai" is an enhanced version of the Hyaku Shiki Kai that appears in M-MSV. It seems to be a mobile suit with increased armament and armor, but reduced mobility.
The base is the HG Revive Hyaku Shiki. While using Katoki's design as a motif, I tried to recreate it while incorporating Okawara's M-MSV design drawings. Therefore, it's not equipped with a shield or propellant tanks like many other modelers (though I only see a few online).
The distinctive head shape is from the kit.

Full Armor Hyaku Shiki Kai Wind | GPO144's Gunpla works