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Court narrowly reads "machine gun" statute, rules bump-stock ban outside text
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Summary
In Garland v. Cargill the Court, focusing on statutory text, held a semiautomatic fitted with a bump stock is not a "machine gun" as defined by the federal statute; the majority emphasized the trigger-function language, the dissent urged ordinary-language interpretation, and experts warned of consequences for agency authority.
The Supreme Court resolved a statutory question in Garland v. Cargill, holding that the federal definition of "machine gun" does not encompass a semiautomatic weapon fitted with a bump stock. The majority, authored by Justice Thomas, read the statute's "single function of the trigger" language narrowly and emphasized the mechanical trigger function; that approach led the Court to conclude the bump-stock modification did not meet the statutory definition.
Why it matters: The case turned not on the Second Amendment but on statutory interpretation and the scope of agency authority. "I just want to stress this isn't a Second Amendment case. This is a statutory interpretation case," Erwin Chemerinsky told the podcast.
Facts and procedural posture: The statutory definition at issue describes a machine gun as any weapon that "shoots or is designed to shoot or can be readily restored to shoot automatically more than one shot without manual reloading by a single function of the trigger." After the Las Vegas mass shooting, the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) reclassified bump-stock-fitted weapons as functionally equivalent to automatic weapons. Mr. Cargill surrendered a semiautomatic with a bump stock and challenged the ATF's ban. The Fifth Circuit sided with Cargill, and the Supreme Court then took the statutory question.
Majority and concurrence: Chemerinsky summarized the majority view as a focus on the trigger function; the opinion included diagrams and reasoned that a true machine gun requires a single trigger function that fires multiple rounds. Justice Alito's concurrence emphasized textualism and warned that legislative tragedy alone does not change the statute; he noted Congress may amend the law if it seeks a ban.
Dissent and agency-deference context: The dissent (Sotomayor, joined by Kagan and Jackson) argued the majority misread the ordinary meaning of "single function of the trigger," saying that an ordinary person would view holding the trigger as satisfying the statutory text. Grove and Chemerinsky noted the case unfolded against a background in which courts are less inclined to defer to agencies (Chevron deference) and that the Court's reasoning reduces scope for agency reinterpretation of ambiguous statutes.
Implications: The ruling narrows agency regulatory scope and may prompt Congress to act if it wants to prohibit bump stocks expressly. Lower courts and agencies will face questions about how to regulate functionally similar devices under the statutory text.
