I'm guessing you need a 4 or 5 axis machine to make a gun. These cost more than the buildings that you need to contain them. (OK, there's this guy, but probab

I'm guessing you need a 4 or 5 axis machine to make a gun. These cost more than the buildings that you need to contain them. (OK, there's this guy, but probably not big enough: https://pocketnc.com/ https://pocketnc.com/.) I don't think it's unreasonable to say that if you need to own and know how to operate a CNC mill in order to do a mass shooting, mass shootings are going to decrease. CNC is not "hit print", it's a skill that requires training and development. (Looking at /r/3DPrinting, I can tell you that many people manage to screw that up. CNC is like 3D printing, but about 10x harder. Some may argue that you need some more zeroes on there, actually.)