The far-left "news" source,Addicting Info, fawningly cited by the Coalition to Stop Gun Violence, accused gun makers last Friday of "helping criminals get away with murder." Manufacturers are doing this, we are told, by opposing legislation requiring all new semi-automatic handguns (well, not all of them, of course--law enforcement and other government hired muscle would naturally be exempt) be equipped with technology that would stamp the cartridge case with identifying information about the pistol that fired it.
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In the comments, Explains some of the problems that can arise from this supposed great technology. A technology that can be defeated with a simple file.