Whoa, I forgot to post the question.
About 13yrs ago I sent a friend in hawaii a complete upper receiver only. The understanding was that he would get a firearm license soon after. Since then, he has been overseas, lived in another state, moved back etc..... He is about to move again and found the upper in storage. He didn't get around to being licensed to own. I know it's not a firearm but with all these gun laws nowadays I'm unsure if it's safe for him to just send me the upper in the mail. I don't want him to be in trouble if it's illegal to own a piece of a firearm without a license. Can anyone from hawaii give any guidance on the situation? Thanks.