An anonymous reader writes "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. Also coming soon this year, civilians will also be able to buy three-shot Tasers, rubber bullets, as well as Heckler and Koch black rifles." This might not be good news for the citizens of New Jersey.