I was talking to Jason at Underground Tactical Arms about the world’s first 3D printed metal gun. [Click here for TTAG’s review.] The gun’s manufacturer (Solid Concepts) is based in Austin, along with precision guided rifle manufacturer TrackingPoint. I suggested that Austin has become the silicon valley of firearms. I wondered what kinds of new and different firearms could be created with a 3D printer, given that the $600k machine can produce prototypes in days and create parts that injection molding machines can’t. “You want to talk about revolutionary,” Jason said. “What about a railgun?” Turns out that the University of Texas at Austin’s Center for Electromechanics is building them for the Army, Navy and Marines. They’re not hand-held. Yet. But remember that lasers used to occupy entire rooms. Now, not so much. The laser rifle above may not be practical, but someday, it will. As always, watch this space.