A federal judge ruled on August 17 that parts of the federal ghost-gun rule were unconstitutional as applied to plaintiffs challenging it. The 2022 ATF regulation treats certain firearm kits and unfinished frames or receivers as firearms, requiring commercial manufacturers to obtain licenses, add serial numbers and conduct background checks. The Supreme Court previously upheld ATF's statutory authority to issue the rule but did not resolve the constitutional arguments addressed in the new ruling. That leaves a live dispute over traceability and background checks versus personal firearm manufacture and constitutional limits. The useful line is not simply homemade versus factory-made. It is whether commercial products designed to become guns should pass through the same basic safeguards.