TLDR: No one can say what the future holds for 3D-printed guns, but the possibility of printing off weapons at home is a great avenue for fiction to explore.
Like smart guns, 3D-printed firearms are an emerging technology that’s perfect for speculation when writing fiction. This is an area of firearms the real world isn’t yet sure about. With the proliferation of 3D printers across the consumer market, you can bet 3D-printed firearms will be showing up in fiction sooner rather than later.

