HaveBlue then decided to push the limits of what was possible and print an AR-15 rifle. To do this, he downloaded plans for an AR-15 in the Solidworks file format from a site called CNCGunsmith.com. After some small modifications to the design, he fed about $30 of ABS plastic feedstock into his late-model Stratasys printer. The result was a functional AR-15 rifle. Early testing shows that it works, although it still has some minor feed and extraction problems to be worked out. …

While there are still some details to sort out, it’s pretty clear that making weapons at home using 3-D printers from commonly available materials is going to become much more commonplace in the near future. In fact, as 3-D printing technology matures, materials feedstock improves, and designs for weapons proliferate, we might soon see the day when nearly everyone will be able to print the weapons of their choice in the numbers they desire, all within the privacy of their own homes.