While an argument can be made for the Model 1 Mark III — which had a few ... making it a top-class suit of Iron Man armor. The Model 4 is one of the armors that Iron Man wore the longest as ...

Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.