>>There is a federal law that allows LEOs to carry concealed regardless of local or state laws.<<
Ask your Sheriff what he thinks of that law. I believe that Sheriff’s still issue CCW permits to the FBI and BATFE agents assigned to their counties.
There is a court case (from memory so I cant site at moment) where a NY or NJ port authority arrested a Coast Guard LEO. Case was thrown out and the individual successfully sued the arresting authority.
Sheriffs can ignore the law and arrest anyway, but they do so with the a risk to their budgets.