Hawaii is among 17 US states asking Congress to abandon legislation that would let people with concealed-carry gun permits move freely between states.
Hawaii's Attorney General Doug Chin said lawmakers had always made sure there were much stricter gun rules in the Aloha state compared to other states.
Mr Chin said not only would it override local public safety but it would also endanger communities and the police as well as encourage gun trafficking.
He said it would also strip local residents of protections passed by their own lawmakers.
"We find that to just be completely a terrible step and it's definitely a step in the wrong direction because each state has their own sovereign right to be able to determine their own public safety as we are in the best place to be able to determine what is best for our community," Mr Chin said.
Mr Chin signed a letter to the House and Senate leadership, along with other AGs who, combined, represent over 140 million Americans.
The Concealed Carry Reciprocity Act of 2017 has over 200 co-sponsors in the House of Representatives.