From Ammoland:

On September 2, 2022, the United States District Court, Northern District of Texas, Fort Worth Division, issued an Opinion and Order granting a preliminary injunction, in part, on the ATF “Final Rule” which radically changed the decades-long definition of what is a firearm in federal law.  The opinion explains that ATF created the longstanding definition of what a firearm is in 1978. Now, over forty years later, they are updating and expanding the definition into new areas.