Barnett v. Raoul: Assault-Weapon and Large-Capacity Magazine Bans Upheld Under Bruen’s “Principles of Regulatory Tradition” and Salerno Facial-Challenge Limits

1. Introduction

Caleb Barnett v. Kwame Raoul arises from Illinois’s 2023 enactment of the Protect Illinois Communities Act (“the Act”) after a mass shooting at a Chicago-suburb Independence Day parade. The Act broadly criminalizes the manufacture, sale, delivery, purchase, and possession of defined “assault weapons” and “large capacity ammunition feeding devices,” while including significant grandfather clauses for preexisting lawful owners.

Plaintiffs—individual gun owners, firearms-market participants, and Second Amendment advocacy organizations—sued Illinois officials (and certain local officials) under 42 U.S.C. § 1983, seeking declaratory and injunctive relief on Second Amendment grounds. After preliminary injunction proceedings and the Seventh Circuit’s earlier guidance in Bevis v. City of Naperville, the Southern District of Illinois held a bench trial and entered a permanent injunction, concluding that much of the Act violated the Second Amendment and was not severable, and enjoining the Act in its entirety.

On appeal, the Seventh Circuit reverses. Although the Act regulates multiple weapons and devices, the court centers its merits analysis on the Act’s application to AR-15s and thirty-round rifle magazines.

2. Summary of the Opinion

The Seventh Circuit holds that the Act’s restrictions on AR-15s and thirty-round rifle magazines are constitutional because they are consistent with “the principles that underpin our Nation’s tradition of firearm regulation”: a longstanding tradition of imposing targeted restrictions on weapons viewed as particularly dangerous. The court therefore reverses the district court’s judgment and remands with instructions to enter judgment for defendants.

The court also rejects plaintiffs’ facial challenges as overbroad because they failed to show that “no set of circumstances exists” under which the challenged provisions could be valid, given that the Act indisputably covers items (e.g., grenade-launcher-equipped firearms, and certain ammunition belts/devices) that plaintiffs did not defend as constitutionally protected.

Finally, the court reaffirms the constitutionality of the Act’s endorsement affidavit requirement (a registration component of the grandfather clause), treating it as analogous to constitutionally permissible “shall-issue” licensing regimes.

3. Analysis

3.1. Precedents Cited (and How They Drive the Decision)

  • Bevis v. City of Naperville (7th Cir. 2023): The court treats Bevis as the key circuit anchor. While recognizing the post-Bevis record development focused largely on step-one “Arms” issues, the panel finds the historical-analogue record largely unchanged and maintains Bevis’s step-two conclusion. Importantly, the panel here assumes (for purposes of decision) that AR-15s and the magazines are “Arms,” then upholds the law under Bruen step two—thereby insulating the holding from disputes about Bevis’s step-one framing.
  • New York State Rifle & Pistol Ass'n v. Bruen (2022): Provides the governing two-step methodology: (1) text coverage; (2) historical tradition. The opinion uses Bruen mainly to structure the inquiry and to require “relevantly similar” analogues judged by “how” and “why” they burden the right.
  • District of Columbia v. Heller (2008): Supplies (i) the foundational recognition of an individual right, (ii) the “not unlimited” principle, and (iii) the opinion’s pivotal reliance on Heller’s statement that M16s “may be banned.” The panel uses Heller to legitimate targeted restrictions on especially dangerous weapons and to resist a purely numeric “common use” dispositiveness.
  • McDonald v. City of Chicago (2010): Confirms Second Amendment incorporation against the states; functions as a jurisdictional/constitutional baseline rather than a contested point.
  • United States v. Rahimi (2024): A central interpretive pivot. The panel reads Rahimi as clarifying that Bruen does not require “close founding-era comparators,” and as elevating the inquiry to whether modern laws cohere with the “principles that underpin our regulatory tradition.” This “principles” framing is the opinion’s doctrinal engine.
  • Wolford v. Lopez (2026): Used for three propositions: (i) the Second Amendment is not absolute; (ii) courts should weigh number/acceptance/similarity of analogues and compare “how” and “why”; and (iii) warnings against overly general justifications that “water[] down the right.”
  • United States v. Hemani (2026): Cited for the same “how/why” and time-period discussion, including the ongoing uncertainty about whether 1791 or 1868 is primary, and for the idea that close mirroring strengthens constitutionality.
  • Schoenthal v. Raoul (7th Cir. 2025): Cited for de novo review of constitutional law and for accepting nineteenth-century statutes as relevant evidence given incorporation timing.
  • Trump v. CASA, Inc. (2025): Not a Second Amendment precedent; it is cited to note that the district court’s universal injunction became problematic after CASA, but the Seventh Circuit deems the issue moot given reversal.
  • Moody v. NetChoice, LLC (2024), Wash. State Grange v. Wash. State Republican Party (2008), United States v. Salerno (1987): These cases supply the modern skepticism of facial challenges and the stringent “no set of circumstances” standard. The Seventh Circuit leverages these to narrow the litigation posture: the plaintiffs’ facial theory fails even before reaching the hardest merits questions.
  • Lockhart v. McCree (1986), Anderson v. City of Bessemer City (1985), Bose Corp. v. Consumers Union of U.S., Inc. (1984): These inform the opinion’s careful discussion of standards of review, legislative facts, and “constitutional facts,” even though the panel ultimately avoids selecting among them by assuming clear-error protection for district court findings.
  • Cockrum v. State (1859), Aymette v. State (1840), Haynes v. State (1844), Carr v. State (1879), Hathcote v. State (1891), Nunn v. State (1846): These state cases appear as historical evidence in the analogue analysis, particularly to support a tradition of restricting certain especially dangerous weapons (Bowie knives) and to interpret statutory terms like “journey.”
  • Other circuit cases are used to identify a “unanimous circuit consensus” approving bans on AR-15s and/or large-capacity magazines, including Capen v. Campbell, Ocean State Tactical, LLC v. Rhode Island, Nat'l Ass'n for Gun Rts. v. Lamont, Bianchi v. Brown, Duncan v. Bonta, and Hanson v. District of Columbia. The panel treats this as confirmatory and prudential (avoid manufacturing a conflict absent compelling reason), not as the formal basis of decision.

3.2. Legal Reasoning

A. Framing the case: facial challenges and narrowing to AR-15s + 30-round magazines

The opinion first imposes a procedural gate: because plaintiffs brought facial challenges, they bear the burden to show that the challenged provisions are invalid in all their applications. Applying United States v. Rahimi (quoting United States v. Salerno), the panel states that if even one application is constitutional, the facial challenge fails.

Here, the court finds plaintiffs did not defend all applications (e.g., weapons with grenade launchers; feeding devices such as belts holding more than thirty rounds). That deficiency independently defeats facial invalidity. Still, the court elects to decide the “heart of the dispute” by addressing AR-15s and thirty-round magazines as the parties’ focal scenario, following the approach exemplified by Bianchi v. Brown.

B. Bruen step one is assumed; step two decides the case

The panel expressly assumes AR-15s and thirty-round magazines are “Arms” covered by the Second Amendment’s text and proceeds to Bruen step two. This move both simplifies the analysis and avoids making the case depend on contested “Arms” categorization logic.

C. The step-two thesis: tradition allows targeted restrictions on especially dangerous weapons

The court’s core holding is that the Act aligns with a longstanding tradition of restricting “particularly dangerous” weapons while leaving many others available, and that modern laws need not have a “historical twin.” The court treats United States v. Rahimi as authorizing a principle-based approach: the constitutional inquiry is whether the regulation matches “the principles that underpin our regulatory tradition.”

D. Bowie knife regulations as the leading analogue

Rather than recataloging every historical statute, the panel foregrounds a single exemplar: 19th-century regulations of the Bowie knife. The opinion emphasizes that Bowie knives were widely owned and had lawful uses (including self-defense and hunting), yet jurisdictions:

  • banned carry outright (with narrow imminent-threat exceptions in some places),
  • banned concealed carry,
  • restricted sales or imposed heavy taxes,
  • and courts sustained such regulations and emphasized the weapon’s extreme lethality (e.g., Cockrum v. State).

The panel uses these laws to show both the “how” (targeted weapon-specific restrictions, sometimes sweeping and penal) and the “why” (addressing weapons posing special danger) that can justify a modern restriction on AR-15s and large-capacity magazines.

E. Applying Bruen’s “how” and “why” metrics

How: The Act operates categorically, backed by criminal penalties and indefinite duration, but it is also targeted (specific weapon/magazine types) and leaves ample alternatives (notably many handguns). The court characterizes the burden as “minimal” in light of defendants’ evidence that use of rifles and more than ten rounds in self-defense is rare, and it highlights the grandfather clause as a further mitigation.

Why: The court rejects “protecting Illinois communities” as too general (public safety is always the government’s claim) but accepts a narrower justification: protecting the public from weapons that pose a special danger. The court then links this to record evidence of AR-15 lethality (velocity, range, wounding mechanism) and how large-capacity magazines amplify those features.

F. “Common use” is not dispositive

The panel acknowledges the popularity of AR-15s but declines to make “numbers alone” controlling. It notes that New York State Rifle & Pistol Ass'n v. Bruen analyzed historical analogues even after recognizing handguns as “in common use,” implying that commonality does not end the inquiry.

G. The “more nuanced approach” (technological change + mass shootings)

As reinforcement (not the linchpin), the court invokes Bruen’s suggestion that cases involving “unprecedented societal concerns or dramatic technological changes” may require more nuanced analogical reasoning. The opinion treats AR-15s with thirty-round magazines as dramatically different from widespread Founding-era and Reconstruction-era arms in practical rate-of-fire and casualty potential, and it treats modern lone-actor mass shootings as a distinctively modern regulatory challenge.

H. Registration/endorsement affidavit upheld

The court quickly upholds the “endorsement affidavit” registration requirement, relying on its earlier holding in Bevis v. City of Naperville and analogizing to “shall-issue” licensing regimes endorsed in dicta by New York State Rifle & Pistol Ass'n v. Bruen. Because the affidavit process is free, non-discretionary, and purely informational, it is treated as constitutionally permissible.

3.3. Impact

  • Strengthening principle-based step-two analysis: The opinion reads United States v. Rahimi to authorize a “principles underpinning tradition” approach rather than a near-identity analogue requirement. That framing is likely to influence how district courts evaluate modern weapon-specific restrictions.
  • Constraining facial Second Amendment litigation strategy: By enforcing the Salerno “no set of circumstances” requirement, the decision incentivizes plaintiffs to bring as-applied challenges (or at least to comprehensively cover every regulated item) when statutes regulate many weapons/devices at once.
  • Reinforcing a nationwide appellate consensus: The panel aligns itself with the First, Second, Fourth, Ninth, and D.C. Circuits’ approvals of assault-weapon and/or large-capacity magazine bans, reducing the likelihood of circuit conflict being the sole driver of Supreme Court review (while noting the Court’s grants in Viramontes v. Cook County and Grant v. Higgins).
  • Registration regimes: The endorsement affidavit holding contributes to a growing body of appellate language treating non-discretionary, low-burden, informational registration/licensing requirements as generally compatible with Bruen, subject to as-applied challenges if administered discriminatorily.

4. Complex Concepts Simplified

  • Facial vs. as-applied challenge: A facial challenge claims a law is invalid in all its applications; an as-applied challenge claims the law is invalid as applied to the plaintiff’s particular situation. The court holds plaintiffs did not meet the high bar for facial relief.
  • Bruen’s two steps: Step one asks whether the Second Amendment’s text covers the conduct (e.g., keeping/bearing “Arms”); step two asks whether the law fits the Nation’s historical tradition of firearm regulation (through analogies judged by “how” and “why”).
  • Historical analogue and “relevantly similar”: The government need not find an identical old law; it must show historical laws that burdened the right in a similar way (“how”) for a comparable reason (“why”).
  • “Principles underpinning tradition”: After United States v. Rahimi, the court treats historical laws as evidence of broader regulatory principles (e.g., special restrictions on especially dangerous weapons), rather than as rigid templates.
  • Grandfather clause: A provision allowing people who already lawfully owned an item to keep it under specified conditions (here, sometimes with an affidavit; for magazines, generally without registration).
  • Universal injunction: An injunction that prevents enforcement of a law against anyone, not just the plaintiffs. The opinion notes concerns after Trump v. CASA, Inc., but deems them moot due to reversal.

5. Conclusion

The Seventh Circuit’s decision in Caleb Barnett v. Kwame Raoul establishes (or at least crystallizes within the circuit) two practical rules for Second Amendment litigation post-Bruen: (1) weapon and magazine bans can survive Bruen step two when supported by historically grounded principles authorizing targeted restrictions on especially dangerous weapons—without requiring a “historical twin”; and (2) broad Second Amendment facial challenges are especially vulnerable when the statute regulates many items and plaintiffs fail to defend each application under the Salerno standard.

By reversing the permanent, statewide injunction and reaffirming the permissibility of a non-discretionary registration mechanism, the court returns the central policy choice—whether to adopt such restrictions—to “our elected representatives,” while leaving room for narrower as-applied challenges to the Act’s unaddressed applications.