[guns] smart guns

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Great, now I'm writing a post that will be squashed by my own filter.

Anyway, there are relatively cheap implantable transponders with only work on close proximity (few cm) and are hence difficult to jam. By implanting a tiny crypto-authenticating transponder chip into the back of your hand would make their use automatic: the weapon won't fire in anyone else's hand. The only way you'd get hurt is if an attacker wrestles with you while the gun is in your hand.

Actually I think there should be one-way guns about the size of a flashlight, made from a bundle of compound tubes which are ignited electrically (lithium battery). By using a visible laser diode the aim on short range would be accurate enough. Since they are already electrical you wouldn't have to mess with electronics/mechanics interface. If mass-produced, these things would be very cheap.

Point & shoot UI, literally.

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