As many legal observers note, Missouri has some of the most permissive gun laws in the country, but permissive does not mean unlimited. Even in a state with constitutional carry and no permit requirement for most firearms, you can still face serious criminal charges for how, where, or under what circumstances you carry or use a weapon. For residents in and around Festus, understanding where those lines are drawn can make the difference between exercising a legal right and facing a felony conviction.

What Defines Unlawful Use of a Weapon (UUW)?

UUW covers a range of conduct, from carrying while intoxicated to brandishing a firearm, and can be charged as a felony or misdemeanor.

Missouri’s Unlawful Use of a Weapon statute, codified at RSMo § 571.030, lists a broad set of prohibited behaviors. The law does not just target violent acts; it criminalizes specific circumstances in which a person carries, handles, or displays a weapon.

Common examples include:

  • Carrying a firearm while intoxicated, even if you are otherwise legally allowed to own a gun
  • Exhibiting a weapon in an angry or threatening manner in front of others (sometimes called flourishing or brandishing)
  • Discharging a firearm into a dwelling, a vehicle, or toward a person
  • Carrying a concealed firearm into a prohibited location

Section 571.030 lists multiple offenses with differing classifications; some subsections are felonies while other subsections are explicitly misdemeanors—depending on whether the firearm was loaded, whether ammunition was accessible, and other precise facts. Class levels vary depending on the subsection, ranging from misdemeanors up to serious high-class felonies, such as a Class B felony for discharging a firearm at a person. See RSMo § 571.030 for the exact classification tied to each subsection.

The Rules on Carrying in Prohibited Places

Missouri law designates specific locations where carrying a firearm is illegal regardless of permit status, including schools, courts, and polling places.

Missouri’s constitutional carry law, enacted through RSMo § 571.107, means that most Statutory age and exceptions apply to permitless carry; see RSMo § 571.107 and subsequent statutory text for the precise age, effective dates, and specific language exceptions, such as that military status can carry a concealed firearm without a permit. That right, though broad, does not extend everywhere. Certain locations remain off-limits under state law, no matter your permit status.

Prohibited locations under Missouri law include:

  • Police stations, jails, and detention facilities
  • Courthouses and courtrooms
  • Polling places on election days
  • Schools and school buildings
  • Public parks, athletic fields, and sports arenas (subject to statutory exceptions and nuances depending on how the venue is used or posted under RSMo § 571.107)
  • Establishments licensed to sell liquor by the drink

Private property owners also retain the right to prohibit firearms on their premises. If a business posts the required notice in accordance with the rules about required posted notices under RSMo § 571.107, or communicates the restriction directly, carrying a firearm onto that property can expose you to criminal liability. What begins as a simple misunderstanding can quickly turn into a UUW charge that follows you for years.

Penalties for Felon in Possession

In Missouri, possession of a firearm by a convicted felon is a Class C felony for most unlawful possession provisions, with higher classes for repeat or dangerous felony histories, and federal law adds separate, severe consequences.

A prior felony conviction removes your right to possess a firearm under both Missouri and federal law. Under RSMo § 571.070, any person convicted of a felony offense who possesses, transports, or has control over a firearm commits a Class C felony under the current text of most provisions, though statutory class levels vary and may be elevated to higher classes for individuals with repeat or dangerous felony histories. That charge carries up to seven years in prison under Missouri’s sentencing guidelines.

Federal law under 18 U.S.C. § 922(g) mirrors this prohibition. A federal felon-in-possession conviction can result in up to ten years in federal prison, and the sentence is often served without the possibility of parole, as federal parole was largely abolished for offenses committed after November 1, 1987. When both state and federal prosecutors have jurisdiction, a person can face charges in both systems.

The definition of who qualifies as a prohibited person extends beyond felony convictions. Under federal law, the prohibition also applies to individuals convicted of misdemeanor domestic violence offenses, those subject to certain protective orders, and people who have been involuntarily committed to a psychiatric facility. Missouri law similarly restricts firearm access for individuals who have been adjudicated as mentally incompetent or involuntarily committed.

If you have any prior convictions or legal history involving mental health adjudications, getting clarity on your current rights before handling a firearm is critical.

The Right to Self-Defense and Gun Laws

Missouri’s stand-your-ground law allows the use of force, including deadly force, in self-defense without a duty to retreat, but important legal limits apply.

Missouri law supports the right to self-defense. Under RSMo § 563.031, a person may use physical force to defend themselves or others when they reasonably believe it is necessary to prevent serious physical injury or death. Missouri does not impose a duty to retreat before using force in a place where you have a lawful right to be.

That protection, though significant, does not eliminate legal risk. Using a firearm in self-defense can still result in criminal charges if prosecutors believe the force was excessive, unreasonable, or used against someone who posed no genuine threat. The claim of self-defense must be supported by facts, and the circumstances will be scrutinized carefully.

Self-defense claims also do not protect you from a UUW charge arising from how you were carrying the weapon before the incident occurred. For example, if you were intoxicated at the time of a self-defense shooting, a UUW charge for carrying while intoxicated could still apply regardless of whether the shooting itself was justified.

Facing Firearm Charges in Festus? We Can Help.

Firearm charges in Missouri carry consequences that extend well beyond fines. A felony conviction affects your right to vote, your ability to own firearms in the future, your employment, and your housing options. These cases demand prompt attention and a thorough understanding of Missouri’s statutes.

At Grafe & Batchelor, P.C., Attorneys at Law, our criminal defense attorneys in Festus handle firearm-related charges with the seriousness they deserve. Whether you are facing a UUW charge, a felon-in-possession allegation, or questions about your rights, we are ready to review your case. Call us at (636) 220-5934 or contact us to schedule a consultation.

Last updated: July 2026