Thanks, your topic post here and thread is important. Paul Mitchell put in a lot of work as Supreme Law Firm, retired for past 6 years. I just found the 1990s case where the 7th Circuit Court of Appeals held that Bureau AT [F]ibbers has jurisdiction over the “first sale” of a firearm brought in to the country. U.S. v. F.J. Vollmer & Co.. 1 F.3d 1511 (1993). https://casetext.com/case/us-v-fj-vollmer-co-inc. (search “first sale” in text to find relevant section /understanding of the Commerce Clause application)