MO HB2176

Creates the "Anti-Red Flag Gun Seizure Act" prohibiting state and local enforcement of any federal or state red flag laws that direct seizure of firearms, with $50,000 civil penalties for violations and waiver of sovereign immunity for enforcement actions

Lowers the minimum age for concealed carry permits from 19 to 18 years for all applicants, removing the previous exception that only allowed 18-year-olds who were military members or veterans to obtain permits

Establishes a presumption of reasonableness in self-defense cases, shifting the burden so defendants no longer must prove their use of force was justified, and grants immunity from criminal prosecution and civil liability for justified self-defense

Removes local authority to regulate open carrying of firearms, eliminating provisions that previously allowed jurisdictions to prohibit open carry with certain exceptions for concealed carry permit holders

Imposes $50,000 civil penalties on political subdivisions that enact firearm regulations violating state preemption law, with standing for any resident to sue and sovereign immunity waived