I tried to recreate a mobile suit that appeared in Mobile Suit Gundam 0080: War in the Pocket MSV.

The "RX-78NT-1 Full Armor Gundam Alex" is a full armor version of the Alex, as shown in the instruction manual (assembly diagram) of the old Alex kit. It seems to be sometimes called the "Alex Enhanced Armor Test Type."

It appears to be a mobile suit with the setting of having armor implemented as FSWS (Full Armor Weapon System) instead of Chobham armor on the Alex.

I made this using an HG Alex, from which I stripped parts when I made an "Armored Gundam Mk-II" style model a while ago. It's a B-CL kit from over 10 years ago.

Full Armor Alex style | GPO144's Gunpla works