I'm not sure if you are trying to import or not....but if you are, see "First", if not, skip to "Second"
First of all....you can't really import any guns from outside of country (not going to go into that too much), but essentially, you need to factory or expert prove that it does fire above 366 fps.
Second, ehobbyasia is quite reliable as far as I can tell.
Ares M110 LEAF - Ares Striker Tan
TM G17 Pink - KJW P226 TwoTone