So recently I've been thinking about upgrading my Mp5k into a Polar star. It is my most used gun and I really love it. Its originally a galaxy Mp5k but works just fine. I was wondering what mags would be best for handling a 30+RPS gun. And also, should I sell my WE-TECH MSK to get more money to sell it or keep my MSK. Last is Amped airsoft a good website to buy a firebase kit, because a friend of mine recommended it but then another friend said their air rigs are the best, and I should try East Coast airsoft even though it is more expensive. What do you guys think I want more opinions before I make a decision.