There is no single minimum sentence for a felon in possession of a firearm. In Illinois, the minimum depends on which statute you are charged under, how many prior felony convictions are on your record, what those prior felonies were, and whether the case is prosecuted in state or federal court. At the low end, a first-offense unlawful use of a weapon by a felon carries a minimum of 2 years in Illinois state court. At the high end, the Armed Career Criminal Act imposes a 15-year federal mandatory minimum if you have three qualifying prior convictions.
That gap is enormous. Which end of it you fall on is determined by facts that are already locked in by the time of arrest. Illinois imposed a record 3,342 prison sentences for illegal firearm possession in 2023 — more than any year in the state’s history. By the end of that year, one out of every nine people in an Illinois prison was there for a firearm-possession offense. These cases are prosecuted aggressively, and the sentencing consequences are severe. What follows is a breakdown of the specific charges, the sentencing ranges attached to each, and how much time is actually served.
What Is the Illinois State Penalty for a Felon Caught With a Gun?
The most common state charge is unlawful use of a weapon by a felon under 720 ILCS 5/24-1.1, often abbreviated UUWF. This statute makes it illegal for any person convicted of a felony to possess a firearm. A first UUWF offense is a Class 3 felony carrying a sentencing range of 2 to 10 years in the Illinois Department of Corrections. A second or subsequent UUWF conviction is a Class 2 felony, which carries 3 to 14 years.
The minimum sentence at the bottom of the Class 3 range — 2 years — is the lowest prison sentence a judge can impose for a first-offense felon-in-possession charge in Illinois. But the word “minimum” can be misleading, because the actual time served depends on Illinois truth-in-sentencing rules. According to data from the Loyola University Chicago Center for Criminal Justice, the average time actually served for people released from Class 3 firearm-possession sentences in 2023 was 1.4 years. For Class 2 releases, the average was 2.2 years. These averages include pretrial custody credit, which can account for a large part of the sentence.
UUWF is the charge most people are thinking about when they search for “felon in possession of a firearm.” But it is not the only — or the most serious — version of this offense in Illinois.
What Happens If I Have Multiple Prior Felony Convictions?
If you have two or more prior qualifying felony convictions, the charge escalates from UUWF to the armed habitual criminal statute, 720 ILCS 5/24-1.7. This statute was renamed “unlawful possession of a firearm by a repeat felony offender” effective January 1, 2025, under Public Act 103-822. The elements are essentially the same — a person receives, sells, possesses, or transfers any firearm — but the qualifying priors change the sentencing exposure entirely.
The list of qualifying prior convictions is broader than most people expect. It includes any combination of two or more of the following: forcible felonies as defined in 720 ILCS 5/2-8; listed weapons and violence felonies (including UUWF, AUUW, aggravated discharge of a firearm, vehicular hijacking, home invasion, and aggravated battery with a firearm, among others); and violations of the Illinois Controlled Substances Act or Cannabis Control Act punishable as a Class 3 felony or higher.
Out-of-state convictions can serve as qualifying prior convictions. However, their elements must match a listed Illinois offense or fall within the forcible-felony definition, as the Third District held in People v. McGhee, 2020 IL App (3d) 180349.
The sentencing consequences of this escalation are dramatic. Armed habitual criminal is a Class X felony carrying 6 to 30 years, and it is non-probationable. Under Illinois truth-in-sentencing requirements at 730 ILCS 5/3-6-3(a)(4.7)(i), the sentence must be served at 85 percent. That means if you are sentenced to the 6-year minimum, you will serve approximately 5.1 years in prison. If you assumed you were facing a 2-year Class 3 UUWF exposure, your record may put the real minimum at more than double that. And there is no possibility of probation.
Possession under this statute can be actual or constructive, as the Illinois Supreme Court held in People v. Givens, 237 Ill. 2d 311 (2010).
Can I Be Charged Federally Instead of in State Court?
Yes. Federal prosecutors in the Northern District of Illinois regularly charge felon-in-possession under 18 U.S.C. § 922(g). This statute makes it illegal for any person convicted of a crime punishable by more than one year of imprisonment to possess a firearm or ammunition. A violation carries a maximum of 10 years in federal prison.
If you have three or more qualifying prior convictions, the Armed Career Criminal Act at 18 U.S.C. § 924(e) imposes a 15-year mandatory minimum. This is one of the harshest sentencing provisions in federal criminal law, and it applies automatically once the required number of prior convictions is met.
The numbers reflect how seriously federal courts treat these cases. According to the U.S. Sentencing Commission, 7,419 people were sentenced nationally for federal felon-in-possession offenses in FY2024, with an average sentence of 71 months — just under 6 years. The imprisonment rate was 97.7 percent. In the Northern District of Illinois specifically, the mean sentence for federal firearms offenders in FY2024 was 57 months, with a median of 50 months.
The decision of whether to charge a case in state or federal court is made by prosecutors, not by you. The same arrest can result in either, and in some instances both jurisdictions will pursue charges. One important federal requirement was established by the U.S. Supreme Court in Rehaif v. United States, 588 U.S. 225 (2019). The government must prove you knew of your prohibited status at the time you possessed the firearm.
How Much of the Sentence Will I Actually Serve?
Illinois truth-in-sentencing rules determine what percentage of a prison sentence must be completed before release eligibility. For armed habitual criminal convictions, the requirement under 730 ILCS 5/3-6-3(a)(4.7)(i) is 85 percent of the imposed sentence. UUWF and AHC sentences are served at 85 percent when that requirement applies. By contrast, UUW and AUUW offenses are generally served at 50 percent.
In practical terms, a 6-year AHC sentence means approximately 5.1 years in custody. A 2-year UUWF sentence served at 85 percent means roughly 1.7 years. But averages from actual releases tell a slightly different story because pretrial custody credit reduces the remaining time to be served. Loyola’s data shows that people released from Class 3 firearm-possession sentences in 2023 served an average of 1.4 years. Class 2 averaged 2.2 years. Class 4 averaged 0.9 years, with much of that time due to pretrial custody credit.
The bottom line: whatever the sentence imposed, you will serve most of it.
Arrested for Felon in Possession in Chicago? Talk to DRD Law.
The sentencing range for a felon-in-possession charge is not one number. It is a spread determined by your prior record, the statute prosecutors choose to charge, and whether the case stays in state court or goes federal. Those variables need to be analyzed by a defense attorney who understands how they interact.
DRD Law is a Chicago criminal defense firm led by David R. Drwencke, who has handled over 565 criminal defense cases and spent nearly seven years as a judicial law clerk to the Honorable Rudy J. Nichols in Oakland County Circuit Court, where he observed hundreds of bench and jury trials and gained insight into how judges think and rule. The firm is located at 332 S. Michigan Avenue, Suite 900, and offers real-time case tracking and 24/7 attorney communication through a proprietary mobile app.
If you or someone close to you is facing a felon-in-possession charge in Illinois, the specific sentencing exposure depends on facts that need to be analyzed now. Do not wait until a plea offer is already on the table. Contact DRD Law for a consultation.
