I'm interested in various signal cannon type devices or a thunder mug that goes boom. They're not designed to fire projectiles, nor are signal cannon (and non signal) considered a firearm by the atf. How do you think the state of Hawaii would feel about it? It has to be illegal somewhere I just can't find where.

the State also made aerial fireworks illegal but every NYE youd think otherwise. As a matter of fact aerials have been going off weekly in Waipahu

HRS 134-1 Definitions:
"Firearm" means any weapon, for which the operating force is an explosive, including but not limited to pistols, revolvers, rifles, shotguns, automatic firearms, noxious gas projectors, mortars, bombs, and cannon.

https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0001.htm

HRS 134-8 Ownership, etc., of automatic firearms, silencers, etc., prohibited; penalties.
(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.

If it's designed to use loose black powder, it's exempt from registration:  HRS134-3(d)(1)
https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0003.htm

I think the biggest concern would be discharging it.  It's supposed to be illegal to do in a residential area, but as mentioned, "fireworks."

The big question to me would be whether the fact it's not designed to fire a projectile.  The definition includes "weapons."  If it's not designed as a weapon, I think the case can be made it doesn't fall under the Hawaii definition of a firearm.

I'm not a lawyer, but that seems about as clear as any other part of the ambiguous Hawaii gun laws.

the State also made aerial fireworks illegal but every NYE youd think otherwise. As a matter of fact aerials have been going off weekly in Waipahu

Welcome to any random weeknight on Windward Oahu.

https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0001.htm

If it's designed to use loose black powder, it's exempt from registration:  HRS134-3(d)(1)
https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0003.htm

I think the biggest concern would be discharging it.  It's supposed to be illegal to do in a residential area, but as mentioned, "fireworks."

The big question to me would be whether the fact it's not designed to fire a projectile.  The definition includes "weapons."  If it's not designed as a weapon, I think the case can be made it doesn't fall under the Hawaii definition of a firearm.

I'm not a lawyer, but that seems about as clear as any other part of the ambiguous Hawaii gun laws.

Most use black powder, some use the cakes but can use ack powder. They are not designed to fire a projectile. Probably best I don't dick with it. Thanks for the input

https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0001.htm

If it's designed to use loose black powder, it's exempt from registration:  HRS134-3(d)(1)
https://www.capitol.hawaii.gov/hrscurrent/Vol03_Ch0121-0200D/HRS0134/HRS_0134-0003.htm

I think the biggest concern would be discharging it.  It's supposed to be illegal to do in a residential area, but as mentioned, "fireworks."

The big question to me would be whether the fact it's not designed to fire a projectile.  The definition includes "weapons."  If it's not designed as a weapon, I think the case can be made it doesn't fall under the Hawaii definition of a firearm.

I'm not a lawyer, but that seems about as clear as any other part of the ambiguous Hawaii gun laws.

I am thinking the only way it would be allowed is if there was something that prevented a projectile from being shot out of the barrel.