Hey guys. i wanna buy a new mp7 and a bunch of mags for it. i have a pantac mps rig (http://www.airsoftgi.com/product_info.php?products_id=7097) that i have to use with my p90 (w/ box mag & special mod for midcaps....ask me about it) and my m4. can i use smg mags for the mp7 in these? has anyone heard of anyone doing that? or should i just buy some pouches and slap them on the front of the rig?