Not everyone who knows about 3D-printed guns is worried – the more you know about them, the less they scare you.

The narrator in the following clip discusses after 0:40 how the makeshift shotgun bullets (including a piece of bubble gum) that the makers used were much more effective than the 3D-printed kind.

He says that those who say 3D-printed guns are dangerous don’t know much about firearms – but is there any other type of gun that could pass through an airport security scanner? If so, I don’t know of it.