I like the pose in the third pic best. It's open, honest, and direct. The slight smile shows optomism about society.
I definately think the monochromatic looks gives age and a hint at oppression, which I assume is intended, because it provokes the progress question.
Although I can draw the parallel between "modern Army weapon", maybe not everyone can. Maybe "currant miltary weapons" or "current military rifles" would work better.
I definately like the idea though, but definately nix on the bare feet. Too stereotypical.