Well, here is the final rule on the so called Ghost Guns. I guess we will see if any lawsuits happen.
www.gunsamerica.com

It’s Official: ATF Finalizes and Publishes 'Ghost Gun' Rule
The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has officially published its new rule redefining the term “firearm” and banning so-called “ghost gun” kits.