Do up some shoulder pads and I think you would be there.
I will say that going off of the original scheme with the original Heavy Infantry having the turtle armor, the current heavy infantry is closer to what IMHO light infantry should have looked like. Although I like the old Campaign Covers (like what Drill Instructors/Sgts wear), they are not combat headgear; I it a little silly that these guys have huge shoulder pads and chest and knee pads and gas masks but the most sensitive part of their body has a felt hat.