UUW (Unlawful Use of Weapons) is usually a misdemeanor. AUUW (Aggravated Unlawful Use of Weapons) is a felony — the “A” stands for “aggravated.” It means the state has added a factor that turns the same basic conduct into something far more serious. That single letter is the difference between a charge that tops out at under a year and a fine, and one that can put a felony on your record and send you to prison.
This article breaks down what each charge actually is, the specific factors that turn a UUW into an AUUW, how the penalties compare side by side, whether an AUUW charge can be challenged as unconstitutional, and what to do next if you’re facing either one.
What is UUW in Illinois?
Unlawful Use of Weapons, under 720 ILCS 5/24-1, is the baseline weapons offense in Illinois. In most cases it’s a Class A misdemeanor, punishable by up to 364 days in jail and a fine of up to $2,500 (730 ILCS 5/5-4.5-55).
The statute covers two broad things. The first is possessing, selling, or carrying certain weapons that Illinois bans outright — items like switchblades, ballistic knives, brass knuckles, throwing stars, machine guns, short-barreled rifles or shotguns, and suppressors. The second is carrying or possessing a firearm — a pistol, revolver, stun gun, or taser — either concealed on your person or inside a vehicle. This is the one most people are charged under. There are important exceptions: the law generally doesn’t apply to carrying on your own land, in your own home or fixed place of business, or in someone else’s home if you’re there as an invited guest with permission.
Two things worth knowing about how UUW gets charged. A second or subsequent offense under certain subsections can be bumped up to a Class 3 felony (720 ILCS 5/24-1(b)). Location also matters — carrying near a school, park, courthouse, public housing, or transit can elevate the charge into felony territory. And if a gun is found in a car, the vehicle-presence rule (24-1(d)) treats it as the presumed possession of everyone in the vehicle. That’s how passengers who swear they never touched a gun still end up charged.
What is AUUW, and what makes it “aggravated”?
Aggravated Unlawful Use of Weapons, under 720 ILCS 5/24-1.6, is the same kind of carrying — a firearm on your person, in your vehicle, or on a public way — plus at least one “aggravating factor” the statute lists. That added factor is what makes it “aggravated,” and it’s what turns a misdemeanor-level situation into a felony.
Base AUUW is a Class 4 felony, which carries 1 to 3 years in prison but is eligible for probation. If it’s a second or subsequent offense, or if you already have a prior felony conviction — in Illinois or any other state — it jumps to a Class 2 felony, 3 to 7 years. In plain terms: the “A” means a felony, and your history can make that felony much worse.
This charge is the workhorse of Illinois gun prosecution. It’s the one most people are actually looking at when they think they’re facing a “gun charge.” It’s also the reason the difference between these two acronyms is worth understanding precisely.
What turns a UUW into an AUUW?
An ordinary carrying offense becomes AUUW the moment one of the statute’s specific aggravating factors is present. This is the part most people are searching for — you’re trying to find the factor that applies to your situation. Under 720 ILCS 5/24-1.6(a)(3), the most common ones are:
- No valid FOID card. You were carrying without a valid Firearm Owner’s Identification card (the license Illinois requires just to possess a gun or ammunition).
- No valid concealed carry license. You didn’t have a valid CCL (the separate license, under 430 ILCS 66, required to carry concealed in public).
- Loaded and immediately accessible. The firearm — other than a pistol, revolver, or handgun — was uncased, loaded, and within reach at the time, or uncased and unloaded but with ammunition immediately accessible.
- Under 21. You were under 21 and in possession of a handgun (with limited exceptions).
- A recent order of protection. An order of protection was issued against you within the previous two years.
- A prior juvenile felony adjudication. You were previously adjudicated a delinquent minor for something that would be a felony if an adult did it.
- Committing another offense. You were also engaged in a misdemeanor drug violation, or a misdemeanor involving the use or threat of violence, at the time.
If you look at your charging document and see one of these described, that’s the fact the prosecutor is using to elevate your case. Most Illinois AUUW charges rest on the first two — no FOID or no CCL. A huge number of people are charged simply for carrying without the right paperwork, not for anything violent.
Is my charge a misdemeanor or a felony, and how much time?
Here’s the bottom line in one place: UUW is generally a Class A misdemeanor, and AUUW is a felony. The practical gap between them is enormous — jail versus prison, a record you can often move past versus a felony conviction that follows you.
| UUW | AUUW | |
| Classification | Class A misdemeanor (baseline) | Class 4 felony (baseline); Class 2 if prior felony or repeat |
| Possible sentence | Up to 364 days in jail, up to $2,500 fine | Class 4: 1–3 years prison; Class 2: 3–7 years prison |
| Probation | Available | Available on most base AUUW — but not in one key situation |
| Record | Misdemeanor | Felony |
The situation where probation disappears is important. If you were carrying in public, with no valid FOID or CCL, and the gun was loaded and accessible, that combination is not eligible for probation under 24-1.6(d)(2) — meaning a mandatory prison sentence of 1 to 3 years, with no probation option. And at the far end, committing AUUW while wearing body armor without a valid FOID is a Class X felony, one of the most serious classes Illinois has.
One more piece of reality on time served. For those released in 2023 after firearm-possession sentences, the average time actually served was about 2.2 years for a Class 2, 1.4 years for a Class 3, and 0.9 years for a Class 4. Much of that Class 4 time was credit for time already spent in custody before the case resolved. UUW and AUUW sentences are generally served at 50%.
If you want a sense of how much that aggravating factor drives outcomes: after Illinois enacted its 2011 “loaded and accessible” sentencing law, the share of Class 4 gun cases in Cook County resulting in prison jumped from about 25% to over 60% in a single year. The label on your charge isn’t a technicality. It’s the whole ballgame.
Can an AUUW charge be unconstitutional?
Yes — and this matters more than most people realize, because one of the core forms of AUUW was struck down as unconstitutional. In People v. Aguilar, 2013 IL 112116, the Illinois Supreme Court held that the Class 4 “loaded and immediately accessible” version of AUUW (24-1.6(a)(1), (a)(3)(A)) is facially unconstitutional. It violated the Second Amendment right to carry an operable firearm for self-defense outside the home.
There are two real consequences for someone in your position. First, if you’re carrying an old AUUW conviction under that struck-down provision, it is void from the start and can be vacated. That’s significant, because a prior AUUW can be the very thing that elevates a new charge or triggers something worse down the line (see People v. Mosley, 2015 IL 115872, where such a conviction was vacated). Second, not every version of AUUW fell with Aguilar. The FOID-based form — being charged for carrying without a valid FOID card — survived. Illinois’s dual FOID/CCL licensing system was upheld in People v. Thompson, 2025 IL 129965.
The takeaway isn’t that AUUW is unenforceable. It’s that the specific subsection you’re charged under, and the specific priors behind your case, need to be examined closely. Some are vulnerable and some aren’t.
What should I do if I’ve been charged with UUW or AUUW?
Three things, right now:
- Don’t talk to the police about the case. Not to explain, not to clear things up. The presumed-possession rules and your own words are what prosecutors build cases on. You can be polite and still say nothing.
- Don’t assume the charge is the outcome. Whether you’re looking at a misdemeanor UUW or a felony AUUW turns on a specific subsection and a specific set of facts. Both can be challenged.
- Get a defense attorney involved fast. Charge classification drives everything that follows, and issues like a vacatable prior are most useful when raised early.
That last point is where experience matters. At DRD Law, LLC in Chicago, founding attorney David R. Drwencke has built his practice around exactly the kind of evidence-based, fact-first defense these cases demand — pinning down the precise subsection charged, testing whether it holds up after Aguilar, and determining whether a prior driving the charge can be vacated. With more than a decade of experience, 565+ criminal defense cases handled, and nearly seven years spent as a judicial law clerk gaining insight into how judges think and rule, he approaches weapons charges the way these cases demand: by pulling apart the government’s case at the points where it’s weakest.
If you’re facing a UUW or AUUW charge anywhere in Chicago or Cook County, DRD Law offers consultations to walk through your specific charge and where it can be challenged. You can reach the firm at its office at 332 S. Michigan Avenue, Suite 900, Chicago, IL 60604, or through drdlawllc.com.
This article is general legal information, not legal advice. Reading it does not create an attorney-client relationship. Every case turns on its own facts, and you should consult a licensed Illinois attorney about your specific situation.
