or functions to accelerate the rate of fire
I would say... yes, someone could construe it that way
It's conceivable someone somewhere with a disarm America agenda would, but it's not credible that it would be enforced. I'll preempt the question asking if it will require Jerry Miculek's fingers being amputated, or at the least declared NFA Class 3 with a choice of serial numbering and paying a tax stamp or amputating them and sending them to the BATF. Clearly absurd. These are imagination run wild "slippery slope fallacy" arguments.
John