In recent weeks, gun owners have been given two prime examples of just how important strong firearms preemption laws are to the vibrant exercise of Second Amendment rights. On October 22, the Montana Supreme Court struck down[1] a Missoula ordinance that purported to restrict city residents’ ability to transfer firearms. On October 29, Allegheny County Common Pleas Senior Judge Joseph M. James struck down a raft of Pittsburgh ordinances that purported to regulate the use of firearms in public places within the city and provide for the confiscation of firearms without due process. In both instances the tribunals pointed to the state firearms preemption statute as precluding the locality’s anti-gun efforts.Today, almost all states have a firearms preemption law that prohibits localities from regulating firearms in a manner more stringent than state law. These laws are vital as they prevent localities from enacting an incomprehensible patchwork of local ordinances. Without these measures unsuspecting gun owners would be forced to forego the exercise of their Second Amendment rights or risk running afoul of convoluted and potentially inaccessible local rules.A look back at a 1970s edition of ATF’s State Laws and Local Ordinances reveals a baffling mishmash of local ordinances aimed at all manner of firearms related conduct. Prior to the enactment of preemption statutes there were city waiting periods, county gun seller licensing and gun registration schemes, and local permits to purchase regimes.With prodding from moneyed interests[2], localities have become increasingly brazen in defying state preemption statutes.The Missoula case concerned City Ordinance 3581[3]. Passed in 2016, the ordinance criminalized the private transfer of firearms in the city. The ordinance required almost all transfers to take place pursuant to a National Instant Criminal Background Check System check. The city passed the ordinance in defiance of Montana’s strong state firearms preemption statute.The Montana Code Annotated § 45-8-351

Read more from our friends at the NRA