Most states have laws that reserve the power to regulate firearms to the state legislature, but not to any political subdivision (cities, counties, etc.).
Why? So this can’t happen.
If individual cities and counties were to enact their own firearm regulations, states would have a huge mess of patchwork laws leading to honest citizens getting in trouble with the law for some unposted, otherwise-unknown law.
Does Lower Chichester really expect that having new (not existing) homeowners
provide a list of all the firearms they own will have any effect whatsoever on firearm-related crimes and accidents?
Go on, pull the other one.