In the states ANY talk of gun control is at least 150 years too late.

Guns in the states outnumber people by a factor of 2:1 (at least).
So any talk of gun control or extra legislation is kind of pointless.

And the standard argument that crops up among gun enthusiasts in the states that: 'well if more people carried guns, less people would get shot.'
Is just ridiculous, it would be laughable if so many people didn't believe it.

It's often coupled with the 'fact' that only bad people and terrorists shoot people. Statistics show this also to be utter nonsense.

face it guys, as far as the states is concerned - guns are not going away any time soon. And neither will one of the highest numbers of people shot anywhere in the world go away.

More guns=more people shot.

So the issue of 3d printed guns is really only an issue in countries that DO have effective gun controls.
And even there it's not a real issue as ammunition is always controlled along with the weapons.

Yes you could 3d print a gun in the uk, but unless you also knew how to make the ammunition - you couldn't shoot anything from it without illegally buying ammunition.
And if you know someone who illegally sells ammunition - they probably also sell illegal guns as well.
So why bother printing something that's more likely to injure you than anyone else.

In the unlikely event that someone did manage to get anti-gun legislation passed in the states, does anyone actually believe that all those existing guns would be handed in ?
Not going to happen.