Not to be a broken record I have G&P mags for sale, check the Parts and Accessories section for my thread.
If you want new though MAG is in my opinion the better of the two. They feed great and I've seen them feed 30+ RPS setups, the main spring in the channel is actually surprisingly strong that it gets hard to load the last few BB's when it's full up and the spring isn't fully broken in yet.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE