Illinois firearms law operates alongside federal firearms law, and the two frameworks frequently overlap. In areas of overlap, the stricter standard controls. Because Illinois imposes requirements that go well beyond federal minimums -- including the FOID card system, an assault weapons ban, and universal background checks -- firearm owners in Illinois must understand both systems and comply with whichever is more restrictive in each context.[1]
Licensing: FOID vs. No Federal Equivalent
Federal law does not require any license or permit to possess firearms or ammunition. Illinois, by contrast, generally requires a person who possesses a firearm or ammunition to hold a valid FOID card issued by the Illinois State Police under 430 ILCS 65, subject to the statutory exemptions in 430 ILCS 65/2(b), which include nonresidents whose firearms are unloaded and enclosed in a case and nonresidents licensed to have a firearm in their home state.[2] This requirement has no federal parallel and is unique to a small number of states.
Background Checks: Universal vs. Dealer-Only
Federal law requires background checks only for sales through Federal Firearms Licensees (FFLs). Private sales are not subject to a federal background check.[3] Illinois is more restrictive: since July 1, 2023, all private transfers must go through either an FFL or the seller must verify the buyer's FOID card through the ISP portal, and retain a record of the sale for at least 10 years.[3]
Prohibited Persons: Overlapping but Not Identical
Both federal and Illinois law define categories of persons prohibited from possessing firearms, but the lists are not identical. Federal law under 18 U.S.C. 922(g) prohibits possession by convicted felons, domestic violence misdemeanants, fugitives, unlawful drug users, persons adjudicated as mentally defective, and several other categories.[1] Illinois law under 430 ILCS 65/8 includes most of the same categories but adds state-specific disqualifiers, including persons convicted within the preceding 5 years of battery, assault, aggravated assault, or violation of an order of protection in which a firearm was used or possessed (65/8(k)), voluntary patients in a mental health facility within the past 5 years, and persons determined to pose a clear and present danger by a qualified mental health professional. A person may be eligible under federal law but ineligible under Illinois law.[2]
Assault Weapons and Magazine Capacity
Federal law does not restrict semiautomatic firearms based on features or impose magazine capacity limits. The federal Assault Weapons Ban of 1994 expired in 2004 and has not been renewed. Illinois enacted a statewide assault weapons ban effective January 10, 2023, under the Protect Illinois Communities Act, limiting magazine capacity to 10 rounds for rifles and 15 rounds for handguns.[4] A firearm or magazine that is legal under federal law may be prohibited under Illinois law. On June 30, 2026, the U.S. Supreme Court granted certiorari in Viramontes v. Cook County (No. 25-238), consolidated with Grant v. Higgins (No. 25-566), to decide whether the Second and Fourteenth Amendments guarantee the right to possess AR-15 platform and similar semiautomatic rifles. PICA remains in effect while the case is pending.
Rapid-Fire Devices
As of May 6, 2026, federal law no longer classifies bump-stock-type devices as machine guns. The ATF published a final rule amending 27 CFR 478.11 that day, codifying the U.S. Supreme Court's 2024 decision in Garland v. Cargill.[7] Illinois's ban on bump stocks, trigger cranks, and similar rapid-fire devices under 720 ILCS 5/24-1(a)(14) is independent of federal classification and remains in full effect. Possessing a device that is legal under federal law may still be a Class 2 felony under 720 ILCS 5/24-1(b) in Illinois.[4]
Waiting Periods
Federal law does not impose a waiting period for firearm purchases. Illinois imposes a 72-hour waiting period on all purchases -- both handguns and long guns -- regardless of how quickly the background check clears.[5]
The Firearm Owners Protection Act (FOPA) and Interstate Transport
The federal Firearm Owners Protection Act of 1986 (18 U.S.C. 926A) provides a safe harbor for transporting firearms through states where local law might otherwise prohibit possession. Under FOPA, a person may transport unloaded firearms from one lawful state to another, provided neither the firearm nor ammunition is readily accessible from the passenger compartment.[6]
This is particularly relevant for Illinois because the state does not recognize concealed carry permits from other states. A non-resident passing through may rely on FOPA, but if they stop for a purpose beyond what is reasonably necessary for travel, the FOPA safe harbor may not apply. Even then, Illinois law does not automatically criminalize the traveler. The exemptions in 430 ILCS 65/2(b)(9) and (b)(10) cover nonresidents with unloaded, cased firearms and nonresidents licensed in their home state.[6]
Key Takeaway: The Stricter Standard Controls
In every area where federal and Illinois law diverge, the stricter standard applies. Where Illinois law is silent, federal law fills the gap. Where Illinois adds requirements beyond federal law -- the FOID card, universal background checks, assault weapons ban, and waiting period -- those additional requirements are legally binding on all persons within the state.[1]