[from occupied ga]

So how are they to know that the gun you have in your trunk was before or after the license requirement?

Serial number those manufactured after the requirement date will need a license.

[Yo-Yo]

Serial number those manufactured after the requirement date will need a license.

Sales from an FFL are already exempt. This would only apply to face-to-face sales, which by it's very nature implies used guns are being sold.

So no, the serial number wouldn't help catch people skirting this law.