You seem to think that the ideas of the tools designer have some impact on their use for good or evil. I can't remember which (maybe Gatling or Hotchkiss) one designer thought his creation would help end wars because it was so deadly. That worked so well that within a century nuclear weapons were created.
The idea that the purpose the designer had in mind makes a device more or less evil is illogical. It would not be surprising to find that a handgun maker somewhere specifically designed a gun for use by the police. Since the duty of the police is 'to protect and to serve', I can't say that the approved use of a firearm by law enforcement is for killing. Law enforcement employs deadly force to protect the officers and general public. Many private citizens carry for the same reason. Last I read there are over a million folks with carry permits and several states require no permit at all.
By convention and treaty (1899 Hague) small arms such as the AK-47 and M-16, and specifically their ammunition, were designed to wound not kill. This accord requires soft lead bullets be jacketed with a hard metal to keep them from expanding and being more deadly and producing undue suffering in battle. A wound from a FMJ bullet tends to be cleaner and more easily repaired.
None of the aims of designers and those who carry guns preclude criminals from misusing guns or other tools for murder and evil.
Control is a myth. The most effective employment of control that I am aware of exists at ADX Florence in Colorado. The only real control in a free society is self-control. When you vote, vote to inspire actions of government to help decent folks and aid their ideals of self-control. Laws work better when they address the public adult to adult rather than parent to child.