A friend of mine was moving an old desk that he has had for almost 40 years. The desk was passed down form his grand father. While moving the desk he found several hidden compartments that he never knew about. several coins and other itmes were found. The odd ball was a .32 Cal. pen gun. The pen gun was in the box with .32 rounds as well as blanks. There was no paper work with the pen gun, except instructions in the lid.

So the big question is can he declare this weapon and have it registered?
Would it be automatically seized due to ATF laws? Should he turn it over to his lawyer for safe keeping? Any help would be appreciated!