I. A person is guilty of a class B felony if he:
(a) Owns or has in his possession or under his control, a pistol, revolver, or other firearm, or slungshot, metallic knuckles, billies, stiletto, switchblade knife, sword cane, pistol cane, blackjack, dagger, dirk-knife, or other deadly weapon as defined in RSA 625:11, V; and
(b) Has been convicted in either a state or federal court in this or any other state, the District of Columbia, the Commonwealth of Puerto Rico, or any territory or possession of the United States of:
(1) A felony against the person or property of another; or
(2) A felony under RSA 318-B; or
(3) A felony violation of the laws of any other state, the District of Columbia, the United States, the Commonwealth of Puerto Rico or any territory or possession of the United States relating to controlled drugs as defined in RSA 318-B.
I-a. A person is guilty of a class B felony if such person completes and signs an application for purchase of a firearm and the person is a convicted felon under the provisions of paragraph I.
II. The state shall confiscate to the use of the state the weapon or weapons of persons convicted under this section.
III. It is an affirmative defense to a charge under this section that a felony of which a defendant has been convicted in another jurisdiction would not have constituted a felony in the state of New Hampshire at the time such felony was committed.