“Armatix has built a pistol that will disarm itself when it is taken away from a watch that sends it a wireless arming signal. The .22 caliber guns will go on sale in the US within months, and the initial price is 7,000 euro. Higher caliber models will follow. To activate the gun, users must [...]]]> From Slashdot:

“Armatix has built a pistol that will disarm itself when it is taken away from a watch that sends it a wireless arming signal. The .22 caliber guns will go on sale in the US within months, and the initial price is 7,000 euro. Higher caliber models will follow. To activate the gun, users must enter a pin code on the wristwatch, and then keep it within roughly 20cm of the gun. If the person is disarmed, the gun can’t be used against them.