"Federal amnesty law" caught my attention too. Maybe it's a provision of the 1986 Firearms Owners Protection Act. While looking for the correct title, I came across this NRA-ILA piece about the foolery in California concerning
Bullet Serialization and Ammunition registration. It's an interesting read.
"...Bullet serialization...."Learn the rules and beat them at their own game ---
Demand that California put serial numbers on everything --since it is "so cheap",-- to stop theft, counterfeiting and littering.
Also, demand that Congress use the Interstate Commerce Clause to "infringe" violence, etc, in Hollywood movies.