These are junk parts that had fallen apart while being stripped for parts.
It seemed a waste, so I thought I might scrape them together and complete one figure, and so I made one last year.
I mainly used junk from HGUC Gundam and GM, and some from the Origins GM Cannon, and scratch-painted the missing parts.
I started from this state.
To begin with, there was no face 😅, so I carved out some epoxy putty and sculpted it.

Let's gather up some junk and build a Gundam! | GMSKI6385's Gunpla works