Here we go again...
For all of you that are out of the loop, the super safety is made by Hoffman Tactical and designed to be 3D printed out of nylon. Due to the nature of plastic, it has a round count life (100-200 rds), so some people have looked toward machinist with CNC machines to make more permanent solutions. TwinBros3D has been selling them but it appears as if the ATF is now deeming this a machine gun even though it does not meet the guidelines of the definition of a machine gun.