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Duncan v. Bonta

Updated Sep 3, 2026

In brief

Where it stands
Petition Pending

Awaiting an order on the petition

No decision timeline until the Court agrees to hear the case.

What it’s about
This case challenges California’s ban on firearm magazines that hold more than 10 rounds of ammunition, including the law’s requirement that owners give up magazines they had lawfully acquired.
What's at stake
The case could affect law-abiding Californians who want to possess ammunition-feeding devices that hold more than 10 rounds. It could also clarify how courts apply Second Amendment protections to commonly owned firearm equipment.

Summary: written with AI from the case record.

Illustration for Virginia Duncan, et al., Petitioners v. Rob Bonta, Attorney General of California
Conceptual illustration · AI-generated

What it's about

This case challenges California’s ban on firearm magazines that hold more than 10 rounds of ammunition, including the law’s requirement that owners give up magazines they had lawfully acquired. The petitioners argue that these magazines are commonly owned for lawful purposes and therefore protected by the Second Amendment.

The petition relies on the Supreme Court’s earlier statements in Heller and Bruen that the Second Amendment protects arms commonly possessed for lawful purposes.

Question presented

Whether the Second Amendment protects the right of the people to possess these ubiquitous arms.

What happens next

The next step is a Court action on the petition or another scheduling move. No decision window is available yet.

Documents

2

Docket activity

12
  • Case data updated: summary, question_presented, generation_metadata

    Sep 3, 2026 · Court records

  • New analysis added

    Sep 2, 2026 · Court records

  • AI analysis generated: Case Briefing

    Sep 2, 2026 · Generated

  • Case data updated: documents, description, document_url, proceeding_type

    Aug 11, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Aug 11, 2026 · supremecourt.gov

Show 7 more
  • New analysis added

    Aug 4, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Aug 4, 2026 · Court records

  • Case data updated: documents, description, document_url, proceeding_type

    Aug 3, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Aug 3, 2026 · supremecourt.gov

  • Case data updated: documents, description, proceeding_type

    Jun 29, 2026 · supremecourt.gov

  • Brief added: Petition

    Aug 15, 2025 · Court records

  • Court Order added: Lower Court Orders/Opinions

    May 30, 2025 · Court records

More questions

3
What is at stake in Duncan v. Bonta?
The case asks whether the Second Amendment protects possession of ammunition-feeding devices capable of holding more than 10 rounds.
Who could be affected by the California ammunition-device ban?
Law-abiding Californians seeking to possess devices holding more than 10 rounds could be directly affected. The case could also guide courts considering similar restrictions.
What happens next in Duncan v. Bonta?
The Supreme Court may act on the petition or take another scheduling step. Oral argument has not been scheduled.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Sep 2, 2026Methodology

Court records and filings

Reporting and analysis