Why you Should fear the 3d Printed Metal Gun (but it's Not why you think.)

This is one of those situations where I hope I’m wrong since what I see is legislating printing or at least what is printable to the point it’s going to scare off potential innovation in as-yet-unknown markets.

So I’d rather there be strong protections in place rather than a vague ‘it’ls just a hobbiest thing and they wouldn’t bother ringing up their bought and paid for government crony’.