Here’s the relevant section:

Except as provided in paragraph (2), on and after the date that is 180 days after the date of enactment of this subsection, it shall be unlawful for any person to import, sell, manufacture, transfer, or possess, in or affecting interstate or foreign commerce, a trigger crank, a bump-fire device, or any part, combination of parts, component, device, attachment, or accessory that is designed or functions to accelerate the rate of fire of a semi-automatic rifle but not convert the semiautomatic rifle into a machinegun.

The issue is in the definition of “accelerate.” Bumpfire stocks are an obvious step, and are specifically named. The same with hand cranks for triggers. But the bill wants to make anything which increases the rate of fire of a semi-automatic rifle illegal, yet it doesn’t do a good job of outlining exactly what that means.

For semi-automatic firearms the

https://bearingarms.com/tom-k/2017/10/04/does-feinsteins-proposal-p...