Oh hey! I didn't even realize that this was your submission, Itstunafish. I really like this one, and I like the box. I wouldn't change a thing about it. In my opinion, it's the best thing you've put up here.
It will sell in America! (^_^) Lose the design on the back and make the one on the front centered and it's a killer tee, almost literally... Hummm. what happened to the 'e' in 'Sniper' ? Take care of those 2 details and it's done. Funny tee for the young ones.
Nah, I'm just kidding. I don't like the box idea. Make it like a promo poster or something, but the idea of a 3d box on a 2d shirt just looks odd.