Firearm Tracing

Interesting article from lawofficer.com on firearm tracing:

Relatively recently, the ATF established a rule that no manufacturer may reapply an s/n on any other firearm made by that firm. Previously, manufacturers could apply an s/n to a model and repeat them with other model lines. It’s important therefore to collect the model information for a firearm: A Mossberg Model 144 s/n 12345XXX isn’t the same firearm as a Mossberg Model 352 s/n 12345XXX.

h/t Maddened Fowl.