The Bureau of Alcohol, Tobacco, Firearms, and Explosives is currently accepting public comment on their plans for backdoor bump stock gun control.
On December 22 Breitbart News reported a Department of Justice announcement that the ATF would be seeking to redefine the term “machinegun,” so as to include aftermarket devices that do not convert semiautomatic firearms into fully automatic weapons. As of now, only mechanisms/alterations that truly convert a semi-action into a full-action are governed by the National Firearms Act (1934). The efforts to redefine the term “machinegun” center on new controls for devices that merely “mimic” full auto fire.
The pertinent portion of the DOJ’s announcement: