Magazine ban circuit split sends a second case to the Supreme Court

Why it matters: Whether a magazine holding more than ten rounds is protected by the Second Amendment now has two opposite federal answers, and which one applies to you depends entirely on the circuit you live in.

Two federal appeals courts sitting en banc have answered the same constitutional question in opposite ways, and both answers are now headed toward the Supreme Court. In a video posted this month, the firearms-law channel Armed Scholar walks through how the Third Circuit's July ruling striking down New Jersey's magazine ban collides with the Ninth Circuit's ruling upholding California's, and what that collision does to a certiorari petition that has been sitting on the Supreme Court's docket for a year.

What the Third Circuit held on magazine bans

On July 17 the en banc Third Circuit ruled in Association of New Jersey Rifle & Pistol Clubs v. Platkin, consolidated with the Cheeseman challenge to the state's list of prohibited semiautomatic rifles, that New Jersey's prohibition on magazines capable of holding more than ten rounds violates the Second Amendment. Ten of the court's fifteen judges joined the judgment. The video summarizes the reasoning this way: magazines are not accessories sitting outside the constitutional text but ammunition-feeding devices that make a semiautomatic firearm operate, and that protection does not switch off at the eleventh round.

That reasoning runs directly against the approach the en banc Ninth Circuit took in Duncan v. Bonta, which described magazines as accoutrements and drew a constitutional line between magazines at ten rounds and magazines above it. The Third Circuit said so expressly rather than distinguishing the case. As the video frames it, two federal courts of appeals reaching opposite conclusions on the same question is the textbook condition for Supreme Court review.

Duncan v. Bonta and the August supplemental brief

Duncan is already at the Court. The petition challenging California's ten-round limit has been pending since 2025 and, according to docket reporting, has been relisted more than a dozen times without action, a pattern that suggested the justices were holding it while other Second Amendment cases moved ahead of it. On August 3 the Duncan petitioners filed a supplemental brief telling the Court the ground had shifted: the dispute was no longer about how Bruen should apply to magazine limits, but an acknowledged split between two en banc circuits. The same brief points to a March ruling from the D.C. Court of Appeals striking down the District's magazine limit, which also broke with the Ninth Circuit's analysis.

The stay, the October 15 deadline, and the pending rifle cases

New Jersey asked the Third Circuit to keep its ruling from taking effect while the state appeals, and in early August the court granted a stay of its mandate pending a certiorari petition. Practically, that leaves the state's magazine and rifle bans enforceable for now. Procedurally, it points New Jersey at the Supreme Court: its petition is due October 15, ninety days after the July 17 judgment, though reporting on the stay notes the state could ask the circuit justice for a sixty-day extension that would push a filing toward mid-December.

If both petitions arrive, the Court would be looking at the same question from both sides of it. In Duncan, gun-rights plaintiffs are asking the justices to review a judgment that upheld a magazine ban. In the New Jersey case, a state would be asking them to review a judgment that struck one down. Both judgments came from full en banc courts. The video lays out the paths available: grant both and consolidate them, hold one or both, or wait.

The argument for waiting has a specific shape. The Court granted certiorari on June 30 in Viramontes v. Cook County out of the Seventh Circuit and Grant v. Higgins out of the Second, consolidating them for argument this fall on whether the Second Amendment protects possession of AR-15-platform semiautomatic rifles. Those cases are expected to address what counts as an arm, what common use means, and how the historical analysis required by Heller and Bruen is supposed to run. California and New Jersey can therefore argue that the magazine cases should be held and sent back to the lower courts for reconsideration once the rifle ruling lands. The video's read is that this outcome is what the states would prefer, because it defers a nationwide ruling on magazine limits and gives the Third and Ninth Circuits another pass at the question. The petitioners' answer, as the video presents it, is that the split exists now, and that the practical meaning of the Second Amendment currently depends on which circuit a person happens to live in.

What to watch between now and October

Two markers. Duncan remains pending and the justices could act on it at any conference. New Jersey's petition is due October 15 unless the state secures an extension. Until one of those moves, the ten-round line stands as constitutional in the Ninth Circuit and unconstitutional in the Third, with the Third Circuit's judgment stayed and New Jersey's ban still being enforced.

Tags: magazine ban, Duncan v. Bonta, ANJRPC v. Platkin, Third Circuit magazine ban, Supreme Court Second Amendment, circuit split, New Jersey magazine ban, California magazine ban, ten-round magazine limit, Viramontes v. Cook County, Grant v. Higgins, certiorari petition, Armed Scholar, YouTube