October 12, 2017 4:50 AM PDT
https://curbelo.house.gov/uploadedfiles/finalbumpstockban.pdf
"To amend title 18, United States Code, to prohibit the manufacture, possession,
or transfer of any part or combination of parts that is designed
and functions to increase the rate of fire of a semiautomatic rifle but
does not convert the semiautomatic rifle into a machinegun, and for
other purposes. "