This is getting tiresome. Bumpfire stocks do not cause a firearm to fire more than one round per pull of the trigger. Each round fired is caused by a single pull of the trigger. The fact that the recoil of the firearm actuates the trigger is irrelevant to the legal definition of a machine gun. ATF rexamining their previous ruling and suddenly determining that bumpfire stocks are now machine guns is akin to John Roberts gymnastics in the Obamacare mandate ruling.
This is getting tiresome
Yes it is.