Not unless there is a local law that says you must.
No
yes it is illegal to own a sawed off shot gun in pennsylvania...as far as i know its illegal in every state of the US
Depends on the law where YOU are. In MOST of the US, there is no requirement or procedure to register a gun- popular belief notwithstanding.
It's illegal for a minor to buy a gun anywhere in the US.
Alabama
In the US, it is illegal for some people to own a gun- convicted felons, persons that are mentally incompetent, etc. The background check is to insure that you are not a prohibited person.
no
Nope!
If it was a firearm originally manufactured without a serial number (serial numbers weren't required on firearms in the US until the passage of the Gun Control Act of 1968), then no. However, a firearm which originally had a serial number and had it removed - very much illegal.
1933 to 1974.
no
No it is not. You can own termite in the US.