Thanks for the quick and sound advice, Agent_H.
Since Vermont gun laws weren't very stiff, I thought there would no problem.
But here in Canada, an airgun shooting under 500fps is considered as a toy basically, no permits are required. Above that limit, the airgun is considered a firearm. I was trying to find that kind of regulations on airguns in Vermont, but couldn't find any. There is a lot about the concealed carry, and other firearm related info, but airgun are not mentioned.
Anybody has some info about that?