The Final Rule
The rule took effect March 26, 2019; 90 days from the date of publication in the Federal Register.
The final rule clarifies that the definition of “machinegun” in the Gun Control Act (GCA) and National Firearms Act (NFA) includes bump-stock-type devices, i.e., devices that allow a semiautomatic firearm to shoot more than one shot with a single pull of the trigger by harnessing the recoil energy of the semiautomatic firearm to which it is affixed so that the trigger resets and continues firing without additional physical manipulation of the trigger by the shooter.
UPDATE – 2/28/2019
Final Rule FAQ:
https://www.atf.gov/rules-and-regulations/bump-stocks/questions
UPDATE – 12/27/2018
Gun Owners of America (GOA) announced Wednesday that it would challenge the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) over the ban and asked the court for an injunction to block it from moving forward.
12/19/2018
The ATF has changed their ruling on the popular “bump stock” and is requiring current owners to turn in or destroy any you might own.
Click the link below for more information and instructions on proper destruction:
https://www.atf.gov/rules-and-regulations/bump-stocks/how-to-destroy