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Massachusetts's top court upholds minimum age of 21 for gun licenses

Massachusetts's top court upholds minimum age of 21 for gun licenses

Rule Changes Boston, MA local

Ruling rejects Second Amendment challenge from Mikai Thomson, serving 19 to 20 years for manslaughter

Today: SJC upholds under-21 gun license ban

Overview

Updated 1 hour ago

Massachusetts's highest court ruled on October 20 that the state may keep gun licenses from adults under 21. The decision came in an appeal from Mikai Thomson, who was 20 when he was charged with carrying an unlicensed gun in December 2021.

Thomson argued the Second Amendment protects “the people” at any age. The court found the 21-year minimum consistent with the history-and-tradition test the U.S. Supreme Court set in Bruen (2022), which requires gun laws to match the nation's historical practice. The ruling keeps Massachusetts aligned with states that bar under-21s from carrying, even as some federal courts have struck down similar age bans.

The appeal was largely academic for Thomson. He pleaded guilty in September 2025 to manslaughter in a Dorchester shooting and is serving 19 to 20 years in prison.

Why it matters

Massachusetts keeps barring adults under 21 from carrying guns, adding a state high-court ruling to the national fight over young adults' Second Amendment rights.

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Key Indicators

21
Minimum age for a gun license in Massachusetts
Upheld by the Supreme Judicial Court as consistent with the Second Amendment.
19–20 years
Thomson's manslaughter sentence
He is serving this term at Souza Baranowski Correctional Center.
2.5 years
Gun-possession sentence Thomson appealed
His Second Amendment challenge to this conviction failed at the SJC.

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People Involved

Organizations Involved

Timeline

December 2021 October 2026

3 events Latest: Today

Scenarios

1

Supreme Court takes up under-21 gun ban

Possible Resolves by Q2 2027

Discussed by: Legal observers tracking the split over age-based gun bans; the Fifth Circuit struck down a similar Texas ban in Lara v. Commissioner.

A certiorari petition in a case challenging an 18-to-20-year-old carry ban reaches the U.S. Supreme Court. If the Court rules the Second Amendment protects adults under 21, Massachusetts's law and the SJC decision would be at risk of being overturned. A ruling for the state would cement the Massachusetts outcome.

2

Federal court strikes down Massachusetts age law

Possible Resolves by End of 2028

Discussed by: Gun-rights organizations, including the Gun Owners' Action League, which has pressed Second Amendment challenges in Massachusetts.

A separate federal lawsuit challenges the state's 21-year minimum. A federal judge could rule the age limit violates the Second Amendment, creating a split with the SJC and setting up a likely appeal.

3

Massachusetts under-21 ban stands

Likely Resolves by End of 2028

Discussed by: Observers who expect the status quo to hold while age-ban litigation plays out nationally.

The SJC ruling remains the final word in Massachusetts. Courts elsewhere decide age-ban cases, but no court strikes down the Massachusetts law, and Thomson's appeal ends with him in prison.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

June 2008

District of Columbia v. Heller (2008)

The U.S. Supreme Court ruled the Second Amendment protects an individual right to keep a firearm for self-defense, and listed felons and the mentally ill as groups whose gun rights can be restricted.

Then

The ruling struck down Washington, D.C.'s handgun ban and opened the door to decades of Second Amendment challenges.

Now

Courts have since debated who counts as “the people” with Second Amendment rights, including adults under 21.

Why this matters now

Thomson's case asks whether a 20-year-old counts among “the people” Heller protected.

June 2022

New York State Rifle & Pistol Association v. Bruen (2022)

The U.S. Supreme Court struck down New York's strict concealed-carry law and required gun restrictions to be consistent with the nation's historical tradition of firearm regulation.

Then

States and courts began re-examining gun laws, including age limits, under the new test.

Now

Lower courts have split on whether age-based bans pass the history-and-tradition test.

Why this matters now

The Massachusetts SJC applied this test and found the 21-year minimum lawful, aligning with some courts while bucking others.

1792

Militia Acts of 1792

Congress required able-bodied white male citizens aged 18 to 45 to enroll in local militias and equip themselves with arms.

Then

The acts tied gun ownership to militia service for young men.

Now

Litigants on both sides cite the militia age range to argue whether 18-to-20-year-olds were historically expected to bear arms.

Why this matters now

The historical question of whether young adults have arms rights sits at the center of the age-ban debate.

Sources

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