Serial Number Requirements - Firearms

There are several ways to label firearms/guns with serials numbers. If the manufacturer applies serial numbers with a laser, there are methods to recover.

What is your opinion on CCW a P80 with no serial number? : r/polymer80

What are rifle serial numbers? - Quora

Do the same model pistols, for example, if I purchase two P365X Sig Sauer pistols, would they have the same serial number? - Quora

How to find serial numbers on a handgun - Quora

CW Military Firearms Serial Number Records

What is a serial number in a gun? - Quora

How to know if the serial number of a gun has not been modified - Quora

Firearm Serial Numbers - Springfield Armory National Historic Site (U.S. National Park Service)

How to identify a gun? My wife and I inherited a gun from her late grandfather, I Google searched but it gave me too many answers! Where's the best place to go

Starr: The Legislature Should Increase the Consequences for Firearm Serial Number Violations - The Daily Utah Chronicle

Serial Number Engraving on Firearms: Dot Pin & Laser Engraver

My friend inherited some firearms and noticed the serial number is scratched off. Can he keep it or should he get rid of it? And if the answer is get rid of