Imagine this device: It only has button, pressing it will torture every human beeing in earth for 100 years and then wipe out what's left. Trying to disassemble or analyze it will do the same.
Would this still classify as "just a tool"? (peaceful uses: explaining the importance of restraint etc.)
This is not supposed to be an analogy, but a serious question, because I don't believe that guns dont't kill people. And if we disagree on such a fundamental question, I don't think an internet debate could have a sensible outcome .