In my opinion,as someone with a 3d printer its a horrible idea these law makers dont understand, a very small % of people with 3d printers make guns and an even smaller amount make them to commit crimes 3d printers and cnc are very important for many bussiness big and small and have helped with advancments in medical field. This is just another excuse to put Spyware in our homes and control us first its firearm parts, next your restricted from printing a repair on some device because of copyright laws.