sop,
That's exactly what it is. The idea was that the dealer would send the case in along with your identifiers and they would be entered into a database. If a spent casing were found at a crime scene, they would match them up and come knock on your door. I don’t know which if any states ever did or are still doing this maybe the Peoples Republic of California or "shudder" Massachusetts, I can tell you Arizona never did.
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