It is an A&K P-mag clone. You over payed for it, and i a review of a hi-cap mag is not the best use of your time. I'm not trying to be a dick or a bad guy here, I just think the review section is better used for gear (vests, uniform brands and clones, backpacks, etc.) or guns.
Also:
www.airsoftgi.com american, good prices, limited selection
www.evike.com american, good prices, good selection
www.ehobbyasia.com Hong Kong, great prices (expensive shipping though), great selection
www.wgcshop.com Hong Kong, OK prices, good for finding rare pieces
www.rsov.com Chinese? cheap clone stuff
Avoid ebay stores, sometimes you can find gems but as a general rule be very skeptical about any gun you can't return/ test before you pay for it