Originally Posted by Whitebrad25
I'm fairly certain serial numbers (on firearms, anyways) will work as a date stamp (in that after a certain date, that can easily be verified, the serial number would indicate a date the firearm was manufactured).
yes and no
It will tell the date that particular part was released, but it does nothing to determine when it was "built" into a gun if it was transferred as a stripped receiver
If it was an assembled gun when it left there (the manufacturer would've paid the FET tax) but in the case of it being sold as a stripped lower, it does not indicate anything besides receiver.
It doesn't tell if it is a pistol
It doesn't tell if it is a long gun or legal configuration
Only that it was put in the distribution chain on a particular date, and you can't back anything up with that information, only that it exists.
A complete weapon on the other hand, everything can be verified by the manufacturer.
Stripped parts are a different beast.