Missouri Revised Statutes Title XXXVIII. Crimes and Punishment; Peace Officers and Public Defenders § 571.067. Surrendering a firearm to a political subdivision, valuable consideration prohibited, exceptions

(1) The county, municipality, or governmental body has adopted a resolution, ordinance, or rule authorizing the participation of the county, municipality, or governmental body, or participation by an agent of the county, municipality, or governmental body, in such a program; and

(2) The resolution, ordinance, or rule enacted pursuant to this section provides that any firearm received shall be offered for sale or trade to a licensed firearms dealer. The proceeds from any sale or gains from trade shall be the property of the county, municipality, or governmental body. Any proceeds collected under this subdivision shall be deposited with the municipality, county, or governmental body unless the proceeds are collected by a sheriff, in which case the proceeds shall be deposited in the county sheriff's revolving fund under section 50.535. Any firearm remaining in the possession of the county, municipality, or governmental body after the firearm has been offered for sale or trade to at least two licensed firearms dealers may be destroyed.