Was it designed to carry armour? Is there any in in the pic? If there isn't, and it was designed to, it looks mega tight already, good luck getting some in!
Has to be said, cut down jungle hats are the way forwards (referring to first picture, guy on left). The big floppy hats look silly when pulled forwards.
Do you have an AEG somegirls? If so, could you see if the stock and pistol grip would fit on it (maybe with some modification but nothing major)?
Thanks!