I’m saying 180 degrees the opposite. Don’t know how you read that into what I said.
If the Bill of Rights does not apply to states, as it didn’t till the passage of 14A and for quite some time thereafter, and still doesn’t today to some extent, then 2A cannot be used against the states as a shield against local or state gun control laws. In that case, all 2A would do is prohibit federal gun control laws.
If you are going to use the Bill of Rights to invalidate certain state laws you don’t like, then you have to accept it will also be used to invalidate certain state laws you do like.