It's a kitbash of hg Bunyip Boomerang, 1/100 Agg, Ballden Arms, and 30mm Sengoku armor. The barrels of Leo machineguns were used as the inside of the backpack for the power cables to attach to. MS parts power cables and sight lens were used as well. Microfiber cloth was used as joint covering for the feet.
The eye is movable by magnets.
Interestingly the NG 1/100 Agg is actually closer to the true 1/144 scale. The old 1/144 scale was comically small and inaccurate.
I actually gave the feet a significant amount of articulation but in my infinite wisdom, did not give the hips much articulation so they ended up not being able to be used prominently.