to Cruzer, I wasnt at SDCC, but from those pics from the RPFer, where do you see the slant? I can't seem to notice the pocket being angled. Also, after a closer look, you can see that they sewed or pinned the corners of all the pockets down...so it suggests that they could have removed the buttons beneath the flaps.
But then again, I don't even know if the costume there is the screen used suit.
Definatly modified BDUs though