dude, read court cases on appeals for airsoft guns, they mentioned the velocity needed to consider an airsoft gun as firearms without registation. The Velocity is 407fps w/ .22g (I can confirm it as it was on text from one of the court cases) or 430fps w/ .2g. Theorically you can import those without having it seized and destroyed in the end.
Honestly though, I really want to see an organization formed that is par with UKARA. Licensing will help and can deter alot of criminals as well as irresponsible people from getting it. Licensing could also help ensure the license owner will know the laws and rules associated with it.