Missouri Revised Statutes Title XXXVIII. Crimes and Punishment; Peace Officers and Public Defenders § 571.510. Housing authorities not permitted to prohibit lessees from possessing firearms--definitions--immunity from liability, when

1. For purposes of this section, the terms “authority” or “housing authority” shall mean any of the corporations created pursuant to the authority of section 99.040 and any entity or agent associated with such authority that administers or uses public moneys provided by the United States Department of Housing and Urban Development to fund very low, lower, and moderate income public rental housing assistance. For purposes of this section, the term “lessee” means a lessee of residential premises.

2. Notwithstanding any provision of law to the contrary, no housing authority, authority, or lessor receiving public funds from a housing authority or authority shall prohibit a lessee or a member of the lessee's immediate household or guest from personally possessing firearms within an individual residence, common areas, or from carrying or transporting firearms to and from such residence in a manner allowed by law. Any provision of a lease, policy, rule, or agreement in violation of this section shall be void and unenforceable.

3. No housing authority, authority, or lessor under this section shall be liable in tort or any other civil action for damages caused by a lessee's possession or use of a firearm on property owned by the lessor, unless a housing authority, authority, or lessor or an officer, agent, or employee of such housing authority, authority, or lessor: