This is sort of similar to a feature in the Deset Mercs. & Black Ops
In the addon they have 1 unit for each sub-faction without headgear, in the glasses section in the profile area is a selection of headgear... It includes items like a (black) BDU Cap, U.S. Army Beret, U.S. Army Special Forces Beret, Helmet (BDU & uncovered), and a gas mask.
The helmets look awesome, keep it up!