H&K MP7 GBB 40 Round MagazineLet's be honest: Those 40 rounds in the mag of your HK MP7 Navy gas blowback SMG are gonna go quick. If you plan to actually take your MP7 Navy to a game, you're going to need some extra mags. Don't you fret though. We've got your six. Stock up on a few extra mags so you don't have to leave the game early to reload back in the staging area. That stinks! SPECS: Caliber 6mm No Batteries Magazine Capacity 40 rounds Power System Green Gas Warranty 60 Days