Now here's a clever way to make guns safer: only allow them to work for the right person. This new Armatix .22 comes with a custom wristwatch. When the gun is within a few inches of the watch, a green LED on the back lights up, meaning it's armed and ready to fire.
Put it in someone's hands who isn't wearing the watch, however, and the LED turns red, indicating that it cannot fire. I can see this becoming a standard feature on police weapons, ensuring that no danger comes from their guns if they fall into the wrong hands. Cool stuff.
Via Danger Room