The original idea was to make the firing pin and chanber walls imprint a serial number on every case and primer fired, to identify fired cases left at a crime scene. Considering it takes about five minutes total to replace both those parts in a semi auto, AND ignores the fact the brass stolen from a shooting range could be left at a crime scene to confuse the issue, AND ignores that revolvers tend to not left brass behind, AND the fact that the technology just plain does not work, AND the fact that three big names, SiG, Glock, and Smith and Wesson all stated they would stop selling to CZ if this went into efeect due to the huge cost it woul level on gunmakers. Bad idea, hopefully permanentl;y dead in the water, like the infamous NJ law requiring stopping sales of all "dumb guns" once "smart gun" tech is readily available.
