content: Don't be foolish; homemade firearms are not only legal, they have been around far longer than manufactured firearms.  It's absolutely trivial to make a gun, and you can do it with $5 worth of plumbing store supplies which is a lot easier than operating a printer.  Knee-jerk fear of technology is stupid; rather than fear printers because you've recently realized this, stop fearing firearms since you have now learned they're ridiculously simple machines.