Where I hell is the spot on the form that you refer to?
Maybe the Guys that own arms without serial numbers will be interested it the ATF form clause - 10 years in prison and $250,000 fine.
Do you ever read the [bleep] instructions you retard?
Question(s) 26, 27, 28, 29 and 30, Firearm(s) Description: These blocks should be completed with the firearm(s) information. Firearms manufactured after 1968 should all be marked with a serial number. Should you acquire a firearm that is not marked with a serial number; you may answer question 28with “NSN” (No Serial Number), “N/A” or “None.”