[grobdriver]

cannot be released to Mr. Kelly or any other customer for a minimum of 20 days in accordance with local ordinances

Huh?
What purpose could that serve as a "local ordinance"?

[Sender]

It is probably to allow time to see if the gun is reported stolen or otherwise “dirty”. A pawn/gun dealer reports the S/N of the traded-in gun to the cops, and if no one raises any objections within 20 days, it’s probably legit to sell.

[Tucsonican]

Huh? What purpose could that serve as a "local ordinance"?

The 20 day thing has to do with FFL's being required to report the transfer to them and allow the local constabulary to run a check and see if it was used in a crime.