The uniforms look very good congrats!
I guess my only suggestion would be to add the flags to the other backpacks, but I guess that should already be on your plans since you already did that for the Assault Pack Kerry/Medic). btw great idea changing "kerry" to medic to give the backpack a differentiator factor.
on a side note, let's say I would like to have another flag on the uniforms, how would I do that? you did the most usual countries, which is fine, but it would be cool to have others "less popular" flags in there.
I'm pretty much a noop in this department and so I have no clue on how to do something like this...
keep up the good work
cheers