It's kind of wild to realize that some states are trying to outlaw owning blocks of steel that have zero machining operations on them because benchtop CNC exists. I don't even know how they think that this is going to work; make every single machine and tool and die shop have an FFL in order to own a Bridgeport?

This is a fundamental problem with gun control; the tools that are used to make firearms--and to make ammunition components--are widely available, and have many uses outside of making firearms. Most people don't make their own guns because it's more expensive if that's all you're doing, unless that's your business.