Saipan Gun Range Shooting

I looked a bit for the laws, this was about all I found:

Firearms and Ammunition: Any person who possesses any firearm, dangerous device, or ammunition shall, before or immediately upon entrance in the CNMI, turn it in to a Customs Office. The firearm, dangerous device, or ammunition shall be return to the person upon his or her being issued an identification card pursuant to the provisions of 6 CMC §§2201-30.