> Those who are trying to control technology are fighting a losing battle.

However, there is a vast difference between having to fire up a lathe and machine a barrel vs putting together a kit of a half-dozen or so primary parts.

By analogy, most people can put together a computer. Only a very few can actually design and manufacture a motherboard even though it is relatively cheap to do so nowadays.

In addition, most people who are going to go on a shooting rampage probably don't have the skills to operate a lathe or milling machine.