You can buy shotguns and rifles out of state, but not handguns. Also, some states have individual restrictions, so you should check NJ and PA law.
As of August 26, 2010, it is illegal to ship an air gun or air rifle to New Jersey.
grow some
Anywhere it is legal. Your local police and gun shop can help you.
You never need a license to have an Airsoft gun.
Law Enforcment
Buy one.
That will depend on your parents and the rules of the range you go to.
Buy an new one or take it to an airsoft shop or army navy.
New Jersey law treats BB guns and pellet guns as firearms. To buy or possess a BB gun, you need to do the same things you would to buy a real gun. This is a link to the NJ State Code for firearms. Read the definition of firearm very carefully. http://www.state.nj.us/njsp/info/pdf/firearms/062408_title13ch54.pdf
NO
New Jersey, Delaware, Connecticut, and Massachusetts.