Yes, but the quality of a good 3D printed gun will be better and it's easier to download the blueprints and literally print them rather than understand and buil

Yes, but the quality of a good 3D printed gun will be better and it's easier to download the blueprints and literally print them rather than understand and build the gun yourself. I, too, used to stuff firecrackers down a pipe and shoot steel balls (from bearings) when I was a kid - it was fun, what can I say :-)...