Missouri Weapons & Self-Defense Laws (2026)

Body armor is legal with restrictions to purchase and wear in Missouri for civilians without felony convictions. There have been no significant state-level legislative changes concerning body armor in Missouri in recent years.

Missouri law classifies brass knuckles as a dangerous weapon under Mo. Rev. Stat. § 571.010. Possession is generally illegal unless carried openly or with a permit. Concealed carry without a permit is prohibited.

Butterfly knives are legal to own and carry in Missouri with no specific restrictions beyond general knife laws. No significant legislative changes in recent years.

Constitutional carry is legal in Missouri under Mo. Rev. Stat. § 571.030. No permit is required to carry concealed if the person is legally allowed to possess a firearm.

Flamethrowers are legal to own and use in Missouri with no state-level restrictions. No significant legislative changes regarding flamethrowers in recent years.

Nunchucks are legal to own and possess in Missouri with no specific restrictions. No significant changes in recent years.

Open carry of firearms is legal with restrictions in Missouri without a permit for adults who are legally allowed to possess firearms. Missouri became a constitutional carry state in 2017, which was the last major change to its carry laws.

Missouri allows possession and use of pepper spray for self-defense without restrictions on container size or concentration. No permit or registration is required under Mo. Rev. Stat. § 571.030.

Suppressors / Silencers are legal with restrictions in Missouri. There are no state-level prohibitions or additional registration requirements beyond the NFA.

Switchblades are legal to possess and carry openly or concealed in Missouri. Unlawful use of a switchblade is a Class E felony.

Tasers & Stun Guns are legal with restrictions in Missouri. No significant legislative changes since the laws allowing for permitless carry of stun guns were enacted.