The purpose of the Unserialized Firearm Harm Oversight and Serialization Act of 2026 is to enhance the regulation of firearms by requiring that certain firearms, particularly those produced through advanced manufacturing techniques, have serial numbers. This aims to improve tracking and accountability in the firearms market, thereby addressing concerns related to gun violence and illegal firearms. Key provisions of the Act include a requirement for serialization of firearms made using additive manufacturing, which is a modern technique that creates objects layer by layer from digital models.