Third Circuit Split Could Push California Magazine Ban Before Supreme Court

August 3, 2026
6:40 pm

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The Third Circuit’s blunt rejection of the Ninth Circuit’s logic in Duncan v. Bonta is more than a circuit split—it’s a live grenade tossed into the Supreme Court’s lap. Where the Ninth Circuit treated California’s magazine ban as a mere “time, place, and manner” regulation, the Third Circuit recognized that a ten-round limit directly burdens the core Second Amendment right to keep and bear arms “in common use” for lawful purposes. By striking down New Jersey’s identical restriction, the Third Circuit has handed the justices a ready-made vehicle to decide whether states can functionally disarm law-abiding citizens under the guise of public safety—an issue the Court has so far danced around since Bruen. For the 2A community, the stakes are both immediate and strategic. California’s magazine ban has already forced millions of gun owners to either neuter their defensive firearms or risk felony charges; a Supreme Court grant in Duncan would freeze enforcement nationwide and put every capacity-restriction law on the clock. More importantly, the Third Circuit’s opinion supplies the analytical framework the justices need: if magazines holding more than ten rounds are “Arms” under the plain text, and if the historical record shows no analogous tradition of disarming the people, the bans must fall. That clarity could cascade into challenges against assault-weapon restrictions, “sensitive place” overreach, and the ATF’s pistol-brace rule—all of which hinge on the same Bruen test. The timing is equally telling. With Justice Barrett’s textualist majority intact and Justice Thomas’s Bruen opinion still reverberating through the lower courts, the Court now has both the doctrinal tools and the political capital to finish what Heller and McDonald started. If the justices take Duncan, expect a decision that doesn’t merely tinker with intermediate scrutiny but cements the historical-tradition test as the only permissible framework—effectively ending the “two-tier” system that has let blue-state judges uphold whatever gun control they like. For California’s magazine ban, that would be game over; for the rest of the country, it would be the clearest signal yet that the Second Amendment is no longer a second-class right.

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For the 2A community, the stakes are both immediate and strategic. California’s magazine ban has already forced millions of gun owners to either neuter their defensive firearms or risk felony charges; a Supreme Court grant in Duncan would freeze enforcement nationwide and put every capacity-restriction law on the clock. More importantly, the Third Circuit’s opinion supplies the analytical framework the justices need: if magazines holding more than ten rounds are “Arms” under the plain text, and if the historical record shows no analogous tradition of disarming the people, the bans must fall. That clarity could cascade into challenges against assault-weapon restrictions, “sensitive place” overreach, and the ATF’s pistol-brace rule—all of which hinge on the same Bruen test.

The timing is equally telling. With Justice Barrett’s textualist majority intact and Justice Thomas’s Bruen opinion still reverberating through the lower courts, the Court now has both the doctrinal tools and the political capital to finish what Heller and McDonald started. If the justices take Duncan, expect a decision that doesn’t merely tinker with intermediate scrutiny but cements the historical-tradition test as the only permissible framework—effectively ending the “two-tier” system that has let blue-state judges uphold whatever gun control they like. For California’s magazine ban, that would be game over; for the rest of the country, it would be the clearest signal yet that the Second Amendment is no longer a second-class right.

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