MO HB3406

Creates "firearm hold agreements" allowing gun owners to voluntarily transfer their firearms to licensed dealers for temporary storage, with the firearm returned according to agreed terms

Grants federal firearms licensees complete immunity from civil liability for any claims arising from storing or returning firearms under these agreements, including claims related to personal injury or death

Preempts cities and counties from imposing regulations on firearm hold agreements or creating civil causes of action involving the parties

Requires dealers to destroy all records related to firearm hold agreements within 90 days after the agreement ends and the firearm is returned

Prohibits the existence of a firearm hold agreement from being used as evidence of negligence, mental unfitness, or any duty to delay reclaiming the firearm in civil litigation against the owner