Hawaii Revised Statutes Division 1. Government § 134-8. Ownership, etc., of automatic firearms, silencers, etc

(a) The manufacture, possession, sale, barter, trade, gift, transfer, or acquisition of any of the following is prohibited: assault pistols, except as provided by section 134-4(e); automatic firearms; rifles with barrel lengths less than sixteen inches; shotguns with barrel lengths less than eighteen inches; cannons; mufflers, silencers, or devices for deadening or muffling the sound of discharged firearms; hand grenades, dynamite, blasting caps, bombs, or bombshells, or other explosives; or any type of ammunition or any projectile component thereof coated with teflon or any other similar coating designed primarily to enhance its capability to penetrate metal or pierce protective armor; and any type of ammunition or any projectile component thereof designed or intended to explode or segment upon impact with its target.

(b) Any person who installs, removes, or alters a firearm part with the intent to convert the firearm to an automatic firearm shall be deemed to have manufactured an automatic firearm in violation of subsection (a).

(c) The manufacture, possession, sale, barter, trade, gift, transfer, or acquisition of detachable ammunition magazines with a capacity in excess of ten rounds which are designed for or capable of use with a pistol is prohibited. This subsection shall not apply to magazines originally designed to accept more than ten rounds of ammunition which have been modified to accept no more than ten rounds and which are not capable of being readily restored to a capacity of more than ten rounds.

(d) Any person violating subsection (a) or (b) shall be guilty of a class C felony and shall be imprisoned for a term of five years without probation. Any person violating subsection (c) shall be guilty of a misdemeanor except when a detachable magazine prohibited under this section is possessed while inserted into a pistol in which case the person shall be guilty of a class C felony.