(1) A person commits the offense of unlawful possession of a firearm by a convicted person if the person purposely or knowingly purchases or possesses a firearm after the person has been convicted of:
(a) a felony for which the person received an additional sentence under 46-18-221;
(b) an offense under the law of another state or of the United States that is equivalent to an offense that when committed in Montana is subject to an additional sentence under 46-18-221; or
(c) a felony for which the person is currently required to register for the sexual or violent offender registry.
(2) A person convicted of unlawful possession of a firearm by a convicted person shall be imprisoned in a state prison for not less than 2 years or more than 10 years.
(3) A person who has been issued a permit under 45-8-314 may not be convicted of a violation of this section.