October Term 2009 · Docket 08-1569

Does a machinegun trigger a separate mandatory minimum sentence?

The dispute centers on whether using a machinegun creates a distinct crime or merely increases the penalty for the same offense.

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United States v. O'Brien
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Horwich argued that the statutory structure treats firearm types as distinct elements.

    Mr. Fisher argued that no defendant received more than ten years without a machinegun finding.

    Justice Scalia questioned whether the statutory language supports treating weapon type as an element.

    Justice Breyer asked why the Court should depart from its prior interpretation of similar statutes.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

The case tests how courts interpret federal firearm statutes. It asks if specific weapon types define separate crimes or act as sentencing factors.

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How the case got here

The Supreme Court heard oral argument in this case on February 23, 2010.

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What each side wants

the side that brought the case wants the Court to treat the machinegun provision as a separate crime requiring a new jury verdict.

The government wants the Court to treat the machinegun provision as a sentencing factor that judges may consider.

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What each side says

the side that brought the case argues that moving firearm type provisions signals they are distinct elements, not sentencing factors.

The government argues that recidivism and weapon type traditionally function as sentencing factors, not elements.

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What the justices asked

Justice Scalia asked if the statute's drafting implies the firearm type is a separate element.

Justice Breyer asked why the Court should not follow its prior interpretation of similar statutory language.

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Why it matters

This case determines whether defendants face mandatory minimum sentences based on weapon type without a separate jury finding. It clarifies the boundary between criminal elements and sentencing enhancements in federal law.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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