Haw. Rev. Stat. § 134-21: Carrying or use of firearm in the commission of a separate felony; penalty.

(a) It shall be unlawful for a person to knowingly carry on the person or have within the person's immediate control or intentionally use or threaten to use a firearm while engaged in the commission of a separate felony, whether the firearm was loaded or not, and whether operable or not; provided that a person shall not be prosecuted under this subsection when the separate felony is:

(1) A felony offense otherwise defined by this chapter;

(2) The felony offense of reckless endangering in the first degree under section 707-713;

(3) The felony offense of terroristic threatening in the first degree under section 707-716(1)(a), 707-716(1)(b), or [707-716(1)(e)]; or

(4) The felony offenses of criminal property damage in the first degree under section 708-820 or criminal property damage in the second degree under section 708-821 and the firearm is the instrument or means by which the property damage is caused.

(b) A conviction and sentence under this section shall be in addition to and not in lieu of any conviction and sentence for the separate felony; provided that the sentence imposed under this section may run concurrently or consecutively with the sentence for the separate felony.

(c) Any person violating this section shall be guilty of a class A felony.