Hello I purchased an airsoft m9 and had a few questions concerning compatibility and modding. ~What M9 model is it similar to? WE, TM, KJW? I need to know this for when I buy grips and barrel extensions. ~How to disassemble a Umerax m9 magazine? I've seen videos on similar magazine but they push it out with a pin while my magazine has "holes". ~Will it's magazine fit a cqb Russian hpa adapter? If so which one? I want to make hpa but I don't know the correct one to choose.