The Imura Revolver 3D Printed Gun

[bford903]

Please abandon the project. You are clearly a very talented engineer. I know your intentions are engineering discovery, but the negative consequences in this case far outweigh the benefits. I would advise you to refocus your efforts elsewhere.

[WarFairy]

Please abandon the project. You are clearly a very talented engineer. I know your intentions are engineering discovery, but the negative consequences in this case far outweigh the benefits. I would advise you to refocus your efforts elsewhere.

That's not going to happen. Consequences are the fault of people, not design and engineering.

[CaptainObvious]

That's not going to happen. Consequences are the fault of people, not design and engineering.

If the design and engineering is geared towards creating and broadcasting (to call it something) a gun that intrinsically has "illicit use" all over it, without limiting who or what for is going to be used then you can't waive moral responsibility away so easily.
It's not much different as if some chemistry enthusiast set out to teach people how to make nerve gas in the privacy of their homes with readily available materials, to explore the limits of chemistry of course...

Seriously, if you can't appreciate the ethical implications of what you are doing you probably shouldn't be doing it.