Sure, you could argue that this AR-15 semi-automatic rifle only features a 3D-printed lower receiver, but the fact of the matter is that the weapon fired successfully. That's right, a 3D-printed lower receiver was tested to failure shooting real bullets. Continue reading for a video and more information.
It's only a matter of time before 3D printers are able to create objects out of ultra durable metals, like titanium - you could pick up the [TI]ONE Titanium .308 Battle Rifle now for $100,000. Aside from the lower receiver, the rest of the rifle is made from actual gun parts that are designed to handle the 50,000-psi stresses that come with firing a bullet.