The NRAs Jennifer Baker reacted to absence of a grandfather clause by saying:
We are disappointed that this final rule fails to address the thousands of law-abiding Americans who relied on prior ATF determinations when lawfully acquiring these devices. As we recommended to the ATF in our comments on the proposed rule Congress made it possible for the Attorney General to provide amnesty for firearms regulated under the National Firearms Act. The Attorney General should have exercised that authority to provide a period of amnesty under this rule.