I got this from another gun forum where a couple of guys had the ATF come visit them and confiscate parts they had bought off of eBay.
https://www.journal-news.net/journa...cle_26b5b5b7-a5a4-534e-9357-04ec8ea6756a.html
https://www.journal-news.net/journa...cle_26b5b5b7-a5a4-534e-9357-04ec8ea6756a.html