Illinois defines the Unlawful Possession of a Weapon – formally known as Unlawful Use of a Weapon (UUW) – offense by the 720 ILCS 5/24-1 statute. Despite the name, the law has almost nothing to do with using a weapon against another person. It is a possession statute. The State does not have to prove you threatened anyone, swung anything, or fired a shot. It has to prove you knowingly had a particular item, in a particular place, in a particular condition.
That distinction catches people off guard. A person with a valid Firearm Owner’s Identification Card (FOID) who forgot their handgun was loaded under the driver’s seat is subject to a weapons charge. So is a college student with a pair of brass knuckles in a backpack. Neither of them used anything.
The question in a UUW case is what you had and where you had it. Everything else follows from that.
UUW Is Now Called Unlawful Possession of Weapons
On January 1, 2025, a change to the Illinois Criminal Code took effect that renamed this offense. Public Act 103-822 struck the phrase “unlawful use of weapons” from the statute and replaced it with “unlawful possession of weapons”. The same act renamed “aggravated unlawful use of a weapon” and the “felon-in-possession” offense.
Nothing about the conduct or penalties changed. The legislature changed the label because the old one was not in alignment with what the statute actually covered.
In practice, the UUW abbreviation is still frequently used in the courtroom to refer to the same section of the Criminal Code.
The Name change applies retroactively
If you have an older conviction on your record, the entry may now read “unlawful possession of weapons” even though your case file says something different. This is a relabeling required by Illinois law, not a new charge and not an amended conviction. It does not change your sentence, your record, or your eligibility for relief.
What Counts as Unlawful Possession of Weapons Under Illinois Law
The statute includes a list of various charges. Which item on that list the State accuses you of determines the class of offense, the sentence you face, and how we defend the case. A charge under one subsection has nothing in common with a charge under another beyond the name printed at the top of the complaint.
1
Possessing a prohibited weapon
Illinois bans outright possession of certain items, including bludgeons, blackjacks, metal knuckles made of any material, throwing stars, switchblade knives, and ballistic knives. No intent to use them is required.
2
Carrying a dangerous instrument with intent
The law reaches daggers, razors, stilettos, broken bottles, stun guns, tasers, and similar objects when you carry or possess them intending to use them unlawfully against another person.
3
Carrying a firearm concealed or in a vehicle
Carrying a pistol, revolver, stun gun, taser, or other firearm concealed on your person or inside any vehicle is prohibited unless a statutory exception applies to you.
4
Carrying a firearm in a public place
Carrying or possessing a firearm on a public street, alley, or other public land within the limits of a city, village, or town falls under the same statute, again subject to the exceptions written into the law.
5
Carrying a firearm in a bar, at a ticketed gathering, or while masked
Bringing a firearm or other deadly weapon into a place licensed to sell alcohol, or to a public gathering held under a license or charging admission, is a separate offense. So is carrying a firearm while hooded, robed, or masked to conceal your identity.
6
Possessing a restricted device
Silencers, machine guns, short-barreled rifles and shotguns, bombs and explosive devices, and devices that increase a firearm’s rate of fire carry the most serious penalties in the statute.
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Weapons That Are Illegal to Possess in Illinois
The prohibited weapons list surprises people more than any other part of this law. Brass knuckles are illegal regardless of what they are made of, which means the plastic ones sold as novelties are covered. Throwing stars are illegal. Ballistic knives, which propel a blade using a spring or compressed gas, are illegal.
Switchblades are a different story, and this is the exception most often missed. Illinois amended the statute to permit switchblade possession by a person who holds a currently valid FOID card. If you were carrying a switchblade and you have a FOID card, the State may be prosecuting conduct the legislature specifically legalized.
The statute also expressly exempts crossbows, common and compound bows, and underwater spearguns from the ballistic knife definition. These are not weapons under this section.
Unlawful Use of a Weapon Penalties in Illinois
The most common misconception about this charge is that it carries a single penalty. It actually has a penalty for each subsection, and then a second layer of enhancements stacked on top.
Here is the base structure.
| The conduct charged | Offense class | Sentencing range |
|---|---|---|
| Possessing a prohibited weapon; carrying a dangerous instrument with intent; carrying a tear gas gun or noxious gas device; carrying a firearm concealed or in a vehicle; setting a spring gun; carrying a firearm in a public place; possessing explosive bullets or an assault weapon attachment; carrying a billy club inside a government building | Class A misdemeanor | Up to 364 days in county jail and a fine up to $2,500 |
| Carrying a firearm in a bar or at a ticketed public gathering; carrying a firearm while hooded, robed, or masked | Class 4 felony | 1 to 3 years in prison and a fine up to $25,000 |
| Possessing a silencer; possessing a short-barreled rifle or shotgun; possessing a bomb or explosive device | Class 3 felony | 2 to 5 years in prison |
| Possessing a machine gun; carrying a firearm into a place of religious worship with intent to use it unlawfully; possessing a device that increases a firearm’s rate of fire | Class 2 felony | 3 to 7 years in prison |
| Possessing a machine gun that is loaded and on your person or in a passenger compartment | Class X felony | 6 to 30 years in prison, not probationable |
| A second or subsequent offense for carrying a firearm concealed or in a vehicle, carrying a firearm in a public place, carrying in a bar or at a ticketed gathering, or carrying while masked | Class 3 felony | 2 to 5 years in prison |
The class A misdemeanor charge is where most DuPage County cases sit and that gives us the most room to work. These charges are eligible for court supervision, which completed successfully does not result in a conviction.
Once you are in felony territory in Illinois, you are dealing with prison exposure, a permanent record, and the loss of your firearm rights for life.
Location Can Turn a UUW Misdemeanor Into a Felony
Illinois law adds a separate enhancement based on where the offense allegedly occurred. This layer sits on top of the base penalty and is easy to miss.
Protected places in regard to this charge include:
- Schools and the real property around them (including community colleges and universities)
- School buses
- Public parks
- Courthouses
- Public housing
- Public transportation vehicles and facilities
Inside that zone, conduct that would be a Class A misdemeanor on a residential street becomes a Class 4 or Class 3 felony instead. Silencer and machine gun charges climb to a Class 2 felony carrying a three-year minimum.
Location Changes Everything
The 1,000-foot radius around a school, park, or courthouse covers a great deal of DuPage County. Two people can be stopped for identical conduct on the same afternoon, three blocks apart, and face charges that differ by two full offense classes. Where the stop happened is one of the first things we look at.
Legal Exceptions to Illinois Unlawful Possession of Weapons Charges
Illinois writes its own exceptions into this statute. Each one describes a way of carrying a firearm that is legal. If one of them fits, there was no crime to charge. This is not a plea for leniency. It is an argument that the State’s charge is invalid.
Four conditions make it lawful to transport a firearm in a vehicle or carry one concealed. Only one has to apply.
The firearm was broken down into a non-functioning state
A weapon that cannot fire is not being carried in violation of this section.
The firearm was not immediately accessible
Distance and containment matter. A firearm locked in a trunk is not immediately accessible to a driver.
The firearm was carried under a valid concealed carry license.
If you carried in compliance with the Firearm Concealed Carry Act while holding a currently valid license, this subsection does not apply to you.
The firearm was unloaded and enclosed in a case, and you hold a valid FOID card
A weapon that cannot fire is not being carried in violation of this section.
Beyond those four, the statute does not reach conduct on your own land, in your own home, or at your own fixed place of business. It also does not reach a firearm in another person’s home when you are there as an invited guest with that person’s permission.
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How We Defend Unlawful Use of a Weapon Charges in DuPage County
Challenging the Traffic Stop and the Search
Many UUW cases in DuPage County begin with a stop. An officer pulls a car over for a lane violation, an equipment problem, or an expired registration. Something during the encounter leads to a search, a weapon is found, and the charge follows from there.
That sequence raises three separate legal questions, and each one can determine the outcome of the case. The first is whether the officer had a lawful basis for the stop in the first place. The second is whether the search stayed within what the law permitted, whether it proceeded on consent, plain view, probable cause, or an inventory policy. The third is whether an inventory search was a genuine administrative procedure or a pretext for looking for contraband.
Your attorney should be examining all three. If a motion to suppress succeeds, the weapon is removed from evidence. In a possession case, the weapon is typically the center of the State’s proof, and its absence changes what the prosecution is able to do with the case.
Challenging Whether You Knowingly Possessed the Weapon
The statute requires knowing possession. That single word carries weight in these cases, and it is where many of them come apart.
Consider the situations that frequently produce these charges. A handgun is found under the passenger seat of a car you borrowed. A firearm turns up in the glove box of a vehicle that three people share. A backpack in the trunk belongs to someone else. In each of these, the State has established that a weapon was near you. It has not established that you knew the weapon was there or that you had any control over it. Proximity and possession are not the same thing under Illinois law, and a defense attorney’s job is to keep the court from treating them as though they were.
Pat Weiland spent nearly 10 years evaluating weapons files as a DuPage County Assistant State’s Attorney. He knows how that office reviews a case, what it looks for in a police report, and how a prosecutor evaluates the evidence before deciding how to proceed. When the State cannot connect a weapon directly to a person’s hand or control, the case tends to rest on where that person happened to be sitting. Building the record that separates those two things is often the difference in a UUW case.
Raising Your FOID Card or Concealed Carry License Early
Charging decisions get made quickly, often at the station and on the strength of whatever the officer wrote down at the scene. That is how a case ends up filed against someone who was carrying lawfully: a valid concealed carry license sits in a wallet that nobody asks about, a FOID card never gets run, and a firearm that was cased and unloaded appears in the report as nothing more than a weapon recovered from a vehicle. None of those details are hidden. They simply were not part of the record when the decision to charge was made.
Putting that documentation in front of the prosecutor early is what corrects it. When the factual premise of a charge turns out to be wrong, the State has to account for that before the case moves forward, and the correction is far easier to make before the file gains momentum than after. This is among the clearest reasons to retain an attorney before your first court date rather than after it.
Protecting Your Criminal Record and Your Gun Rights
Not every case ends in dismissal, and when it does not, the objective shifts to the disposition. On a misdemeanor weapons charge, court supervision is not a conviction. Completed successfully, it keeps a conviction off your record and preserves your eligibility to seek expungement later. On a felony charge, the distance between probation and a prison sentence, or between one offense class and the class below it, is the distance that determines what your life looks like afterward.
A weapons conviction also affects your firearm rights permanently. A felony conviction in Illinois means you may not lawfully possess a firearm or firearm ammunition again, and that consequence outlasts any sentence a judge imposes. It is the reason the classification of the charge deserves as much attention as the sentence attached to it.
UUW vs. Aggravated UUW and Other Illinois Weapons Charges
Illinois prosecutes several distinct weapons offenses, and people frequently search for UUW while facing a charge that is not UUW at all. The offenses carry different elements, different penalties, and different defenses. If the charge on your paperwork is one of the following, the law that applies to your case is not the law described above.
Aggravated unlawful use of a weapon
Aggravated UUW, found at 720 ILCS 5/24-1.6, applies when the carrying conduct described above is accompanied by an aggravating factor. The factor charged most often is a firearm that was uncased, loaded, and immediately accessible while the person carrying it did not hold a valid concealed carry license. Unlike straight UUW, aggravated UUW is a felony from the outset.
Unlawful possession of a weapon by a felon
This offense, found at 720 ILCS 5/24-1.1, applies when a person with a prior felony conviction knowingly possesses a firearm, firearm ammunition, or any weapon prohibited under the statute described on this page. It is a felony in every instance, and many circumstances carry mandatory prison exposure.
Illinois also treats being an armed habitual criminal and violating the Firearm Owners Identification Card Act as separate offenses, each with its own statute and its own penalty structure. Neither is a UUW charge.
Unlawful Use of a Weapon FAQs
It depends on the subsection you are charged under. Carrying a firearm concealed or in a vehicle, carrying a firearm in a public place, and possessing a prohibited weapon such as brass knuckles are Class A misdemeanors. Possessing a silencer, a short-barreled shotgun, or a machine gun is a felony. Where the offense allegedly occurred can raise the classification, and a second offense can turn a misdemeanor into a Class 3 felony.
Aggravated UUW under 720 ILCS 5/24-1.6 requires the same carrying conduct plus an aggravating factor. That factor is usually a firearm that was uncased, loaded, and immediately accessible while the person carrying it did not hold a valid concealed carry license. Straight UUW under 720 ILCS 5/24-1 involves no such factor and is frequently charged as a misdemeanor. Aggravated UUW is always a felony.
Yes. A FOID card allows you to own a firearm and to transport one that is unloaded and enclosed in a case. It does not allow you to carry a loaded firearm concealed on your person or within reach in your vehicle. A FOID card does make switchblade possession lawful, and it satisfies one of the four statutory transport exceptions when the firearm is cased and unloaded.
If you carried in compliance with the Firearm Concealed Carry Act while holding a currently valid license, the concealed carry subsections of this statute do not apply to you. Charges are still filed in these situations, often because the license was never presented at the scene or never verified. That documentation needs to reach the prosecutor as early as possible.
Public Act 103-822 renamed the offense effective January 1, 2025. It is the same statute, covering the same conduct, carrying the same penalties. The renaming applies retroactively to criminal background records maintained by the Illinois State Police, law enforcement agencies, and clerks of court.
A switchblade is legal to possess if you hold a currently valid FOID card. Without one, possession is a Class A misdemeanor under this statute. Ballistic knives remain illegal regardless of what licenses you hold.
Court supervision on a misdemeanor weapons charge, completed successfully, is not a conviction and may be eligible for expungement under Illinois law. A felony conviction under this statute generally is not. This is one of the reasons the classification of the charge and the disposition you reach matter as much as the sentence itself.
A felony conviction in Illinois prohibits you from lawfully possessing a firearm or firearm ammunition. A misdemeanor conviction can also affect your FOID card eligibility depending on the offense and the circumstances. Any weapons conviction should be reviewed for its effect on your firearm rights before you accept a plea.
Talk to a DuPage County UUW Defense Lawyer
If you have been charged with unlawful use of a weapon in DuPage County, what happens in the days after your arrest shapes the rest of the case. Evidence is preserved or it is lost. Documentation reaches the prosecutor early or it arrives too late to matter. The charge is reviewed before the file hardens or after.
You do not have to face a weapons charge alone.
Our attorneys are available 24 hours a day, seven days a week, in English and Spanish. Your first consultation is free.