Massachusetts Criminal Defense of Firearms Offenses

Unlicensed Carrying, Possession, Chapter 135 Registration, Sensitive Locations, and Constitutional Defense

Massachusetts Firearms Defense Lawyer

Massachusetts enforces some of the most stringent firearms laws in the United States. Carrying a firearm without a License to Carry (LTC) under M.G.L. c. 269, § 10(a) carries a mandatory minimum sentence of 18 months in a House of Correction — not eligible for a CWOF, not eligible for probation in lieu of the committed sentence, not eligible for a suspended sentence. The 2026 Firearms Modernization Act (Chapter 135, Acts of 2024) added new felony exposure for unregistered and unserialized firearms with an October 28, 2026 compliance deadline. The out-of-state visitor who carries a lawfully-owned firearm into Massachusetts without a Massachusetts LTC is committing a felony before their car reaches the highway.

Every Massachusetts firearms charge begins with the constitutionality of the police encounter that produced the weapon. A firearm found in an unconstitutional stop or illegal search is suppressible — and when it is suppressed, the prosecution has no case. Contact Serpa Law Office at 617.936.0201 for an immediate consultation.

Massachusetts Firearms Offenses: The Complete Statutory Framework

Unlicensed Carrying (M.G.L. c. 269, § 10(a)) — The Core Offense

Carrying a loaded or unloaded firearm outside the home or place of business without a valid Massachusetts License to Carry (LTC) is a felony under M.G.L. c. 269, § 10(a). Penalty: a mandatory minimum of 18 months in a House of Correction, with a maximum of 2.5 years in a House of Correction or up to 5 years in state prison. The mandatory minimum is absolute — no CWOF, no suspended sentence, no probation in lieu of the committed sentence. The 18-month floor binds the judge entirely. The only escape from the mandatory minimum is suppression of the firearm.

Under Massachusetts law, “carrying” means having the firearm on the person or under immediate control in a vehicle. A firearm in the glove compartment, under the seat, or in the center console is within the defendant’s immediate control. A firearm in the locked trunk of a vehicle may not be — depending on the specific facts. For out-of-state travelers, the Firearm Owners Protection Act (FOPA) defense requires that the firearm be unloaded, ammunition and firearm separated, and stored in the trunk or a locked container — not the glove box, center console, or passenger compartment.

Unlicensed (FID Violaton) Possession Inside the Home (M.G.L. c. 269, § 10(h))

Possessing a firearm inside the home or place of business without a Firearms Identification Card (FID) or LTC is a misdemeanor under M.G.L. c. 269, § 10(h), carrying up to 2 years in a House of Correction and a fine of up to $500. Unlike the carrying offense under § 10(a), a CWOF is available for first-time offenders under § 10(h) in appropriate circumstances. For licensed professionals, a CWOF on a § 10(h) charge still triggers the Lautenberg Amendment firearms disability if the charge involves a domestic violence nexus — counsel must assess this before any CWOF is accepted.

Carrying While Under the Influence (M.G.L. c. 269, § 10H)

Carrying a loaded firearm while under the influence of alcohol or a controlled substance is a separate criminal offense under M.G.L. c. 269, § 10H, carrying up to 2.5 years in a House of Correction. These charges frequently arise in combination with OUI charges under M.G.L. c. 90, § 24. Defense of the § 10H charge involves both the constitutional challenge to the traffic stop and the challenge to the underlying OUI determination — the same breathalyzer and field sobriety test defenses applicable to the OUI apply here.

Firearm With Altered Serial Number (M.G.L. c. 269, § 11C)

Possession of a firearm with an obliterated, removed, or altered serial number is a felony under M.G.L. c. 269, § 11C, carrying up to 10 years in state prison. This charge frequently runs alongside § 10(a) unlicensed carrying — the combination creates exposure to consecutive mandatory minimum sentences. The defense challenge focuses on whether the serial number was altered before or after the defendant acquired the firearm, and on the constitutionality of the search that revealed the serial number condition.

Armed Career Criminal (M.G.L. c. 269, § 10G)

A defendant with one prior conviction for a violent crime or serious drug offense who is convicted of unlicensed carrying faces enhanced sentencing under M.G.L. c. 269, § 10G — a minimum of three years in state prison, not eligible for suspension, furlough, or probation. With two or more prior qualifying convictions, the mandatory minimum is five years. Defense counsel must challenge the predicate offenses — whether they constitute qualifying prior convictions under the statute — and the constitutionality of the current charge through suppression.

Chapter 135, Acts of 2024: The 2026 Firearms Modernization Act

The October 28, 2026 Registration Deadline (M.G.L. c. 140, § 121B)

All firearms possessed in Massachusetts must be registered in the MIRCS Unified Gun Portal (gunportal.mass.gov) by October 28, 2026. Any firearm lacking a manufacturer’s serial number must be serialized through DCJIS before registration — to a minimum depth of .003 inches, minimum print size 1/16 inch. Possession of an unregistered or unserialized firearm after October 28, 2026 is a felony under M.G.L. c. 140, § 121B. The November 3, 2026 veto referendum does not create a grace period — prosecution proceeds under the law as it existed at the time of the alleged offense. See: Massachusetts Firearms Registration Deadline: October 28, 2026.

Many Chapter 135 violations are committed by previously law-abiding gun owners who were unaware of or confused by the new requirements. These defendants typically arrive at the clerk-magistrate hearing rather than through a warrantless arrest — which means a private, pre-arraignment hearing is available. A successful clerk-magistrate hearing denial means no CORI entry is created. The clerk-magistrate hearing is the most important proceeding for Chapter 135 defendants, particularly licensed professionals and federal security clearance holders.

Sensitive Locations (M.G.L. c. 269, § 10(j))

Chapter 135 expanded the list of “sensitive locations” where carrying is prohibited even for valid LTC holders. Under M.G.L. c. 269, § 10(j), prohibited sensitive locations now include all government buildings, all school grounds (including every Massachusetts college and university campus), all courthouses, and all polling places. An LTC holder who carries on any Massachusetts university campus — Harvard, MIT, BU, BC, Northeastern, Tufts, Brandeis, Bentley, Emerson, Suffolk — is committing a criminal offense. The charge is prosecuted in the court with jurisdiction over the location of the campus. Serpa Law Office is currently representing defendants in BMC Central and Cambridge District Court on sensitive location violations.

Common Defenses in Massachusetts Firearms Cases

Defense 1: The Constitutional Stop — Suppression of the Firearm

The most powerful defense in a Massachusetts firearms case is frequently the constitutionality of the police encounter that produced the weapon. Under the Fourth Amendment and Article 14 of the Massachusetts Declaration of Rights, police must have reasonable articulable suspicion before initiating a stop and independent probable cause or a recognized exception before searching a vehicle. A firearm found in an unconstitutional stop or vehicle search is suppressible through a Motion to Suppress under Commonwealth v. Carrington (467 Mass. 1, 2014) and Article 14’s more protective vehicle search doctrine.

The key Massachusetts distinction: under Commonwealth v. Gomes and Article 14, a vehicle search incident to a lawful arrest does not automatically authorize a search of the entire passenger compartment — Massachusetts provides broader protection than the federal rule under New York v. Belton. A firearm found in a vehicle search that exceeded the permissible scope is suppressible even if the initial arrest was lawful. When the firearm is suppressed, the § 10(a) charge — and its 18-month mandatory minimum — cannot proceed.

Defense 2: Constructive Possession — When the Gun Isn’t Yours

When a firearm is found in a car with multiple occupants or in an apartment shared by roommates, the Commonwealth must prove beyond a reasonable doubt not just that the defendant knew the firearm was present, but that the defendant had the intent and ability to exercise dominion and control over it — the constructive possession standard from Commonwealth v. Brzezinski and Commonwealth v. Romero. Simply being present in a vehicle or apartment where a firearm is found is not possession. Defense counsel examines: the specific location of the firearm relative to each occupant; who had exclusive access to the storage location; whose fingerprints or DNA are on the firearm; and what statements, if any, were made at the scene that connect a specific person to the weapon.

Defense 3: The FOPA Defense for Out-of-State Travelers

The Firearm Owners Protection Act (18 U.S.C. § 926A) provides a limited federal transit defense for travelers transporting firearms through Massachusetts. Requirements: the journey must begin and end in states where the person may lawfully possess the firearm; the firearm must be unloaded; ammunition and firearm must be stored separately in a locked container in the trunk — not the glove box, center console, or passenger compartment; and the stop in Massachusetts must be limited to gas, food, or a brief rest stop. Stopping in Massachusetts overnight or visiting anyone eliminates the FOPA protection. Attorney Serpa has successfully asserted FOPA defenses in cases where the traveler’s stop was genuinely transitional and the vehicle search was constitutionally defective. See: Firearms Offenses for Massachusetts Visitors and Out-of-State Travelers.

Defense 4: License Defense — Valid License at Time of Possession

A defendant charged with § 10(a) who held a valid LTC or FID at the time of the alleged possession has a complete defense to the charge. License defense issues arise when: a license has expired but the defendant was in the process of renewal; a license was suspended but the defendant was not notified of the suspension; a license was revoked by a municipal licensing authority but the revocation was contested; or the defendant holds a valid out-of-state license that they mistakenly believed was recognized in Massachusetts. Massachusetts does not recognize any other state’s firearms license for carry purposes — but a defendant who reasonably and in good faith believed they were licensed presents a different case at the clerk-magistrate stage than a defendant with no license at all.

Defense 5: The Chapter 135 Good Faith Defense

For defendants charged under Chapter 135 with failure to register or serialize a firearm, defense counsel at the clerk-magistrate hearing presents evidence of good faith compliance efforts: portal registration attempts that were unsuccessful due to technical issues, documentation of the defendant’s lawful purchase and prior possession, evidence of confusion arising from Chapter 135’s phased implementation, and the absence of any prior firearms-related offense. Under the Bradford v. Knights discretionary authority, clerk-magistrates regularly decline to issue complaints against previously law-abiding gun owners who made genuine efforts to comply with the new requirements.

Chapter 135 and Licensed Professionals

For licensed professionals — physicians, attorneys, financial advisors, engineers, and others holding state-issued licenses or federal security clearances — a Chapter 135 firearms violation creates consequences beyond the criminal case. A CORI entry from an arraignment on a firearms charge triggers mandatory licensing board reporting obligations for most Massachusetts licensed professions. For professionals holding federal security clearances — Department of Defense contractors, CJIS-access personnel, federal employees — an arraignment on a firearms charge requires immediate disclosure to the security clearance authority and can result in clearance suspension pending investigation. The clerk-magistrate hearing denial, which prevents any arraignment, is the most effective protection.

Courts Where Serpa Law Office Handles Firearms Cases

Firearms charges are prosecuted in the District Court or BMC with jurisdiction over where the alleged offense occurred:

• Boston Municipal Court — all eight divisions — Suffolk County DA; highest concentration of § 10(a) charges in Eastern Massachusetts; BMC East Boston handles Logan Airport cases involving travelers; BMC Central handles Financial District and downtown Boston street cases
• Cambridge District Court — Middlesex County DA; sensitive location cases on Harvard and MIT campuses; Kendall Square cases
• Woburn District Court — Middlesex County DA; I-93/Route 128 corridor vehicle stops generating § 10(a) charges
• Dedham District Court — Norfolk County DA; Route 1 and I-95 corridor cases; Norwood and Westwood residential cases
• Waltham District Court — Middlesex County DA; Route 128 technology corridor cases; Brandeis campus sensitive location cases
• Quincy District Court — Norfolk County DA; Routes 3 and 128 corridor; South Shore residential cases
• Hingham District Court — Plymouth County DA; Route 3 South Shore corridor cases
• Concord District Court — Middlesex County DA; Route 2 corridor cases; Hanscom AFB-adjacent cases involving federal security clearances
• Framingham District Court — Middlesex County DA; Turnpike corridor vehicle stop cases

Felony firearms charges carrying only a state prison sentence — Armed Career Criminal (§ 10G), certain § 10(a) cases with aggravating factors — proceed to Superior Court. Attorney Serpa has tried firearms cases in both District Court and Superior Court, including a not-guilty verdict in a Suffolk County Superior Court case charging unlicensed carrying and possession with intent to distribute.

See also: Firearms Offenses for Massachusetts Visitors and Out-of-State Travelers, Massachusetts Firearms Registration Deadline: October 28, 2026, Illegal Searches and Seizures in Massachusetts, Criminal Defense for Licensed Professionals in Massachusetts, and Immigration Consequences of Massachusetts Criminal Charges.

Contact Serpa Law Office at 617.936.0201 for a free consultation. Boston office: 20 Park Plaza #400A. Quincy office: 500 Victory Rd., Suite 400A. Available 24 hours a day.