A plastic gun made in a 3D printer fired real bullets during demonstrations over the weekend. Texas-based Defense Distributed has just made the blueprints for the gun available free so it can be ...

[Teaching Tech’s] latest video discusses “3D printed Velcro.” But as even he admits, Velcro is a trademark, so we think it is more appropriate to talk about hook and loop fasteners.

3D-printed guns, often described as a type of "ghost" gun, are untraceable firearms that can be assembled using a 3D printer, downloadable blueprints and some basic materials.