What Heller, McDonald and Bruen Actually Held

For most of the twentieth century, the Supreme Court said almost nothing useful about the Second Amendment. The last serious word before 2008 was United States v. Miller in 1939, a short, murky opinion about a sawed-off shotgun that both sides spent seventy years claiming as a win. Then came three cases in fourteen years, and the ground moved.

If you own a firearm, carry one, or are thinking about it, you should be able to explain these three rulings in plain English. Not to win arguments. Because they define the floor under your rights, and because knowing the floor is the first step to not stepping off it.

Heller (2008): the right belongs to you, not to a militia roster

District of Columbia v. Heller came out of a handgun ban so complete it was almost a dare. Washington, D.C. prohibited private handgun possession outright and required any lawfully owned long gun in the home to be kept unloaded and disassembled or bound by a trigger lock. Dick Heller was a special police officer who carried a handgun on duty at a federal building and couldn't legally keep one in his own apartment.

The Court split 5-4. Justice Scalia wrote for the majority, and the holding was the one gun owners had been waiting a generation to hear: the Second Amendment protects an individual right to keep and bear arms, unconnected to service in a militia, and that right covers traditionally lawful purposes, "most notably for self-defense within the home." The handgun ban fell. So did the trigger-lock requirement, because a gun you can't make ready is a gun that can't defend anybody.

Two details from Heller get skipped and shouldn't be. First, the Court called the handgun "the quintessential self-defense weapon," which matters for every later case about what kinds of arms are protected. Second, Scalia wrote plainly that the right "is not unlimited." He listed measures the opinion described as presumptively lawful: prohibitions on possession by felons and the mentally ill, bans on carry in sensitive places like schools and government buildings, and conditions on commercial sales. He also said weapons that are "dangerous and unusual" fall outside the protection.

That paragraph has been fought over in every federal circuit since. Read it once yourself. It's short.

McDonald (2010): it applies to your state, too

Heller struck down a federal enclave's law. D.C. isn't a state. So the open question was whether Chicago, or California, or your county, had to respect the same right.

McDonald v. City of Chicago answered it in 2010, again 5-4. The Court held the Second Amendment right recognized in Heller is fully applicable to the states through the Fourteenth Amendment. Justice Alito's plurality got there through the Due Process Clause. Justice Thomas concurred separately and would have used the Privileges or Immunities Clause instead, a distinction law students argue about and the rest of us can file away. Chicago's handgun ban went the way of D.C.'s.

Six years later the Court added a small but sharp footnote to the whole project. In Caetano v. Massachusetts (2016), a unanimous per curiam opinion involving a woman who carried a stun gun to protect herself from an abusive ex, the Court rejected the idea that the Second Amendment only covers arms in existence at the founding. Technology moves. The right doesn't shrink to match a musket.

Bruen (2022): the right doesn't stop at your front door

Before 2022, seven jurisdictions ran "may-issue" carry licensing. New York required an applicant to demonstrate "proper cause," meaning a special need for self-protection distinguishable from that of the general community. In practice, in most of the state, ordinary citizens didn't get licenses.

New York State Rifle & Pistol Association v. Bruen ended that, 6-3, Justice Thomas writing. Two holdings, both large.

One: the Second Amendment protects an individual's right to carry a handgun outside the home for self-defense. "Bear" means bear.

Two, and this is the part reshaping litigation right now: the Court threw out the two-step, interest-balancing test the lower courts had built after Heller. No more means-end scrutiny. The new framework is textual and historical. When the plain text of the Second Amendment covers an individual's conduct, the Constitution presumptively protects it, and the government must then show the regulation is consistent with this Nation's historical tradition of firearm regulation.

Justice Kavanaugh, joined by Chief Justice Roberts, wrote a concurrence worth knowing by heart if you carry. It says shall-issue licensing regimes remain constitutional, including fingerprinting, a background check, a mental health records check, and training in firearms handling and in the law of self-defense. Bruen killed discretionary "prove you deserve it" permitting. It didn't abolish permits.

Rahimi (2024): the guardrail on the guardrail

Lower courts read Bruen aggressively, and in 2024 the Court pumped the brakes. United States v. Rahimi upheld the federal law disarming a person subject to a domestic violence restraining order that includes a judicial finding of a credible threat to another's physical safety. The vote was 8-1, Chief Justice Roberts writing.

The Court said judges had been misapplying Bruen. A modern law doesn't need a "historical twin" or a "dead ringer" from 1791. It needs a relevantly similar principle, and the Founding-era surety and "going armed" laws supplied one: someone a court finds dangerous can be temporarily disarmed.

That's not a loss for the Second Amendment. It's the same principle any responsible owner already lives by. Rights attach to responsibility.

What this means for you, practically

The Supreme Court sets the floor. Your state, province and city build on top of it, and the gap between the floor and your actual daily obligations is wide. Nothing here's legal advice. Self-defense, carry, storage and transport law vary enormously by jurisdiction and change often. Ask a qualified attorney in your state, and take a class from a credentialed instructor.

Things to check locally, this week:

• Permit requirements. Some states issue in two weeks, some take six months. Fees commonly run $50 to $200 plus fingerprinting.
• Sensitive places. Post-Bruen, several states expanded the list dramatically. Know what's on yours before you walk into a hospital, a park or a bar with a permit in your pocket.
• Duty to inform. Some states require you to tell an officer you're armed during a stop. Some don't. Know which you're in.
• Reciprocity. There's no national permit. Your license may be worthless one state line over.
• Storage law. Several states now require locked storage in homes with minors, and criminal liability follows a violation.

And then there's the part no court decision touches. The four rules run every time you handle a firearm: treat every gun as loaded, never let the muzzle cover anything you're not willing to destroy, finger off the trigger until your sights are on target and you've decided to fire, and be certain of your target and what's behind it.

Lock it up. A quick-access pistol safe runs $200 to $400 and opens faster than you'll believe until you drill it. Kids find everything. Assume yours will.

Get trained. A one-day defensive handgun course typically costs $150 to $300, and the good ones spend real time on the law of force and on de-escalation, because the fight you avoid is the one you win by a mile. Avoidance first. Distance and a closed door second. Force last, and only when the law allows it.

Scalia's phrase in Heller was "law-abiding, responsible citizens." The Court gave us the first half of that. The second half is on you.