User blog comment:I am the best robot/Liberalism gone crazy/@comment-3312380-20110120150440/@comment-2207030-20110120160451

That all makes sense, but the problem would be to make the parts small enough with this protection to be put on a gun. There was a show on Either the Discovery channel or History Channel called Tales of the Gun, which showed manufactuers trying to make guns mainly for Law Enforcment that could Only be used by the Officer that own the weapon. They came up with a ring device but the parts were still fragile.