From Bearing Arms:

For the third time this year the Supreme Court has rejected a case dealing with the ATF’s administratively imposed ban on bump stocks, denying cert in a challenge to the ban brought by a group of federally licensed firearm retailers and several individuals who argued that the ban was an unconstitutional violation of the Fifth Amendment’s Takings Clause by forcing existing bump stock owners to destroy them without any kind of compensation on the part of the federal government.