N.H. Rev. Stat. § 159:8-a
No person holding a license issued under the provisions of RSA 159:8 shall sell a pistol or revolver to a nonresident unless such nonresident has authority under the laws of the state of his residence, to purchase a pistol or revolver in the state of his residence, or unless the director of the division of state police, for good cause shown, has issued to such nonresident a permit for the purchase of a pistol or revolver. The attorney general shall, at least once annually, file with the secretary of state a summary of the laws of each state of the United States relative to the purchase of pistols and revolvers in such states; and a licensee may rely upon such summary in determining if a nonresident offering to purchase a pistol or revolver has authority to make such purchase under the laws of the state of his residence.
RSA 159:8-a
1967, 220:6, eff. Aug. 21, 1967.