Of the top of my head, I am unaware of any Reg.Mags. that were shipped to law enforcement units, on group purchase orders ( P.Ds., FBI, HPs., etc.) having received registraton cards with the gun, or certificates issued. An individual purchase, by a LEO, or a presentation thereto, would have received the registration card with their RM and could have sent it back to S&W for the certificate. Due to the low number of certificates that have shown up over the years, with the guns, it seems that buyers who sent their application cards back to S&W for the certificates were a small percentage of the guns. I don't think the factory kept any records of certificates issued, however some years ago, I examined the booklet of registraion certificates ( they are perferated for tearing out of the booklet,) and as I recall, there were more remaining certificates than the stubs for the ones torn out. Roy can fill us in more on this. Ed.