# Ghost Guns > [!note] Stub — fill out Privately made firearms without serial numbers — assembled from parts kits, unfinished "80%" receivers, or components made via [[3D Printing and Additive Manufacturing]] — that lack the traceability of commercially manufactured guns and can be acquired without background checks. The [[ATF]] issued a 2022 rule treating ghost-gun kits and unfinished receivers as "firearms" under the Gun Control Act; the Supreme Court upheld it 7-2 in Bondi v. VanDerStok (March 2025). Expand with the crime-gun recovery data, the [[Cody Wilson]] / [[Defense Distributed]] free-speech litigation, and state-level bans.