What are these? AR lowers for ants?

Kent Durree posted these pictures up in a private Facebook Group. He and his buddy are making mini AR lowers for fun. I am pleading him to make more and sell them. Kent says he might make an upper that can shoot a .22 short. I just want the lower as a paper weight/art piece.

Bellow, a .22 short for scale.

Kinda cute, isn’t it?