I really like this, it's a nice story, verry well captured in tehnical terms, sharpness colors and everything, but compositionaly I think it could be better. I feel the crop is a bit too tight, I'd like to see the entire weapon of the girl on the right and also I'd like to see the one in the left not so close to the edge, somewhere in the 3'ds area. Anyways it's a beautiful picture.
The two things that detract from this image are the rifle entering from stage left without an owner and the rifle that seems to slapping the girl in the face. Perhaps the young defender on the left could be aiming the rifle in a classic pose (butt to shoulder) and you could safely lose the rifle entering from the left.