Mobile Frame Zero: Rapid Attack sounds like a Japanese game involving giant robots and, well, that's not terribly far off from the truth. Only it's not a video game, it's a tabletop game. And instead of using plastic pieces, it uses LEGO.
Inspired by MiloZ. I wanted to add functions to this one, and I did! The sub arms fold out, the back has an attachment to hold the minifig's gun as well. The entire thing is very posable and opens up to take out the fig easily.