Haw. Rev. Stat. § 134-10: Alteration of identification marks prohibited.

No person shall wilfully alter, remove, or obliterate the name of the make, model, manufacturer's number, or other mark of identity of any firearm or ammunition. Possession of a firearm or ammunition upon which any mark of identity has been altered, removed, or obliterated shall be presumptive evidence that the possessor has altered, removed, or obliterated the mark of identity.