I said is a few times before. Army surplus stores are a great place for photographer to hang out at and find some nice finds. I think that there is a strong connection between the needs of a soldier and the needs of a photographer.
One particular point where needs converge, is carrying equipment. It is only reasonable that both will need systems that will help them carry dedicated equipment. The soldier needs to carry riffle parts, bullets, field accessories; The photographer needs to carry lenses, small strobes, memory cards and so on.