So what happens when you use laws to make owning a gun legally difficult? You incentivize the trade in illegal guns. And you incentivize the manufacture of home-made guns.

California HS shooter used untraceable ‘ghost gun,’ sheriff says

And it wasn’t even an Evil AR-15, but a mundane .45 caliber pistol, built off the books Because firearm manufacture, especially now in the era of affordable CNC mills, is within the grasp not just of registered firearms corporations, but of modestly dedicated amateurs.