Bans on AR-15-style rifles are constitutional under the Second Amendment

What's this about?

People disagree about whether bans on AR-15-style rifles follow the Second Amendment. Courts have reached different views, and the top court has not ruled on this exact issue.

What supporters say

• Several high courts below the top court have upheld bans on similar rifles.
• The Bruen ruling says gun laws may stand when old laws from the past support them.
• The Heller ruling says the gun right has limits, including limits on weapons that are very deadly and rare.

What critics say

• The top court has not yet decided whether these bans break the Second Amendment.
• Many people own AR-15-style rifles for legal uses, so the law may protect them more strongly.
• Some lower courts say these bans do not fit the history rule from Bruen.

How to read this

The number of points on each side does not show who is right; the strength of the proof matters more.

The bottom line

We are not sure yet whether these bans follow the Second Amendment. Several courts support them, but other courts raise strong concerns, and the top court has not settled the issue.

The constitutionality of bans on AR-15-style rifles remains unsettled. Several federal appeals courts have upheld similar restrictions, but strong objections remain, and the Supreme Court has not ruled directly on the issue.

The case for

Several federal appeals courts have supported these bans. In *Bevis*, the Seventh Circuit declined to block Illinois and Naperville restrictions at an early stage, reasoning that assault-style rifles might fall on the military side of the line rather than among ordinary weapons protected at the core of the Second Amendment. The First Circuit upheld Massachusetts restrictions, emphasizing the rifles’ military features and functions. The Fourth Circuit, sitting as a full court, also upheld Maryland’s assault-weapons ban. 1

The legal foundation for these decisions comes partly from *District of Columbia v. Heller*. That ruling recognized an individual right to possess firearms, but said the right is not unlimited. It also identified longstanding restrictions on “dangerous and unusual” weapons. Courts that uphold rifle bans have reasoned that firearms designed with military features and rapid-fire capability can be treated differently from ordinary weapons used for self-defense. 2

The Supreme Court’s decision in *New York State Rifle & Pistol Association v. Bruen* provides another possible route. *Bruen* requires the government to show that a modern firearm restriction fits the nation’s historical tradition of regulation, rather than simply proving that the law serves an important public-safety goal. Courts upholding assault-weapons bans have said historical limits on unusually dangerous or military-oriented weapons can provide relevant comparisons. 3

The case against

The strongest objection is that AR-15-style rifles may be commonly owned for lawful purposes. Under *Heller*, weapons in common use receive more protection than weapons considered both dangerous and unusual. Justice Clarence Thomas made that argument in a dissent from the Supreme Court’s refusal to hear a challenge to Maryland’s ban, saying the law covered commonly owned AR-15s and that the Court should decide whether they are protected arms. His dissent is not binding law, but it highlights a serious constitutional problem. 4

The Supreme Court’s handling of that case also shows what remains unresolved. The Court left the Fourth Circuit’s decision in place by denying review, but such a denial usually is not a ruling on the merits and does not establish a nationwide rule. The Court has not yet decided whether widespread civilian ownership outweighs an argument based on military design, or which historical examples are sufficient to justify a categorical ban. 5

Some lower courts have rejected the bans. In *Miller v. Bonta*, a federal district court found that California’s restrictions affected conduct covered by the Second Amendment and concluded that the state had not shown adequate historical comparisons under *Bruen*. The court also said that describing rifles as “military-style” did not by itself settle the constitutional question. That decision is not controlling nationwide and has faced further appellate proceedings, but it illustrates that the issue is genuinely contested. 6

The details of the law may matter greatly. “Assault-weapons” statutes differ: some name specific models, others prohibit combinations of features, and many allow existing owners to keep their rifles. A sales restriction may therefore raise a different question from a possession ban. Evidence about the 1994 federal ban cannot decide every modern case, because that law included feature-based definitions, exemptions, grandfathering and a sunset clause.

The bottom line

The evidence favors constitutionality, but only moderately and not decisively. Appellate rulings provide strong support for bans, especially where courts view the rifles as military-oriented and outside the Second Amendment’s central protection. But common ownership presents an equally serious constitutional objection, some lower courts have rejected the reasoning behind bans, and the Supreme Court has not issued a merits ruling applying *Heller* and *Bruen* directly to AR-15-style rifles.

The claim is therefore not a settled nationwide constitutional rule. The result may depend on the exact rifle covered, the conduct restricted, grandfathering provisions and the historical record offered by the government. Safety studies may inform the surrounding debate, but they do not resolve the legal question, since *Bruen* rejects ordinary interest balancing as the main test.