The exterior primarily uses parts from the 76104 Hulkbuster Smash-Up. I wanted a streamlined suit, closer to the size of a minifig, that still felt beefy.
The chest is built around a 30033 bar frame octagonal plate, with clips that wrap around a minifig.
Cutaway of the suit, opened, without a minifig. The clips are surprisingly strong, and can easily hold up the suit's two arms.
Cutaway of how the minifg fits into the suit with the panels closed.
I'm still testing out other 'head' ideas, but the standard Iron Man helmet sits fairly flush in this version.
Repulsors in the back for getting around. The feet don't shoot anything; I needed to secure the space, and liked the color contrast.