Every working gun has a permit and is cataloged.
It has been proven that a working gun can be made using a 3-D printer, and it's cheap.
After some two hundred modifications to Atchisson's original design, Baber finally built a working gun — christened the Auto Assault-12.
The new technology has caused controversy in the US after a student managed to build a working gun with the printer.
Last summer, Cody Wilson, a law student at the University of Texas at Austin, announced plans to design and print a working gun using a 3-D printer, a device that can quickly produce simple, solid objects out of melted plastic from digital schematics.
If you've followed the news, a collective of hackers recently rented a 3D printer to build a real, working gun.
However, in the Oregon case, the offender, Timothy Loren McCoy Fleming, didn't possess a real, working gun; he had an inoperable pellet gun.
For this to work, gun owners have to decide what duty of care they owe to the rest of the public.
Gun control works on gun violence as surely as antibiotics do on bacterial infections.
The gang sold working guns, including the AK-47, for up to £3,000, said prosecutor Joel Smith.
