Blah blah blah. It works, and because it is not perfect doesn't mean it shouldn't be one.
Also: "An article on Wednesday about laser technology used to engrave a microscopic numeric code on the firing pin and breech face of a firearm that is then transferred to ammunition described incorrectly the way in which a stamped code appears after the gun is fired. It is imprinted on the shell casing and on the primer, not just on the casing. A picture caption also described incorrectly the transfer of the numeric code from the firing pin. It is transferred to the primer, not to the casing."
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