Creates provisions relating to immunity from civil liability for federal firearms licensees who enter into firearm hold agreements

HB 3406 protects federal firearms licensees (FFLs) in Missouri from civil lawsuits related to temporary firearm storage under private agreements with gun owners. The bill grants FFLs immunity from claims - including those involving injury or death - arising from storing or returning firearms per a "firearm hold agreement," where owners voluntarily hand over lawfully owned guns for a set period. It also preempts local governments from regulating these agreements or creating new legal claims against FFLs. The law ensures such agreements cannot be used to imply negligence or affect a gun owner's legal right to possess property.