Modifies provisions relating to firearms

HB 726 preempts local gun regulations by prohibiting counties, cities, and other local governments from enacting rules about firearm sales, possession, open carry, or related matters - except for specific ordinances matching state law (e.g., open carry rules with permit requirements or discharge restrictions). It requires open carry permit holders to display permits upon demand and bars officers from restraining individuals without reasonable suspicion. The bill also shields firearm manufacturers from most civil lawsuits related to lawful sales (except for negligence claims) and imposes $50,000 penalties on localities violating the law. This directly affects local governments by removing their regulatory authority over firearms and impacts manufacturers by limiting liability.