Expandable batons are legal to own in Massachusetts in the sense that no statute bans them by name, but carrying one in public is a real criminal risk: if you are arrested on a warrant or during a breach of the peace while carrying it, you can be charged with possessing a “billy or other dangerous weapon” under state law. So the honest answer to the question of whether expandable batons are legal in Massachusetts is: not flatly illegal, but not safely legal either.
What the Statute Actually Says
Massachusetts General Laws Chapter 269, Section 10(b) lists specific prohibited weapons by name: stilettos, daggers, ballistic knives, blackjacks, metallic knuckles, nunchaku, and several others. “Expandable baton” is not on that list. Neither is “baton,” “asp,” or “telescoping baton.”1General Court of Massachusetts. Massachusetts General Laws Part IV, Title I, Chapter 269, Section 10
In Commonwealth v. Perry (2009), the Supreme Judicial Court was asked whether an expandable baton counts as a “blackjack” under the statute. It held that it does not. The court pointed out that some weapons in the list are followed by catch-all language covering similar items, but “blackjack” stands alone.2Justia Law. Commonwealth v. Ami H. Perry So the first clause of Section 10(b), which flatly prohibits carrying the listed weapons, does not reach expandable batons.
The Clause That Can Still Reach You
Section 10(b) has a second clause with different triggers. It applies to anyone who, “when arrested upon a warrant for an alleged crime, or when arrested while committing a breach or disturbance of the public peace,” is found carrying “a billy or other dangerous weapon.”3Mass.gov. Massachusetts General Laws c. 269 s. 10 – Carrying Dangerous Weapons
An expandable baton can qualify as a “billy” or as an “other dangerous weapon” under that clause. The Perry court confirmed the clause’s limited reach: “That provision applies only when a defendant is arrested on a warrant, or is arrested while committing a breach or disturbance of the public peace.”2Justia Law. Commonwealth v. Ami H. Perry
What That Means If Police Stop You
Simply carrying an expandable baton does not, by itself, violate the statute the way carrying a blackjack or switchblade would. The exposure shows up the moment you have a police encounter that leads to an arrest. At that point, prosecutors can charge the baton under the second clause.
If you carry a baton for personal protection and anything goes sideways — a traffic stop that turns into a warrant hit, an argument that gets logged as a disturbance — you can pick up a felony-level weapons charge on top of whatever brought the officer to you in the first place.
At Home Versus in Public or a Vehicle
Section 10(b) targets carrying the weapon “on his person” or “under his control in a vehicle.”3Mass.gov. Massachusetts General Laws c. 269 s. 10 – Carrying Dangerous Weapons It does not contain a blanket ban on keeping an expandable baton in your own home. A baton found at your residence during an arrest or investigation could still become the basis for an “other dangerous weapon” charge, but keeping one at home carries less day-to-day exposure than carrying one around.
Penalties
If you are charged under Section 10(b) for possessing a billy or other dangerous weapon, the sentencing structure has two tracks:
- With prior felony convictions: two and a half to five years in state prison, or six months to two and a half years in a jail or house of correction. No fine-only option.
- Without prior felony convictions: a fine of up to $50, or up to two and a half years in a jail or house of correction.1General Court of Massachusetts. Massachusetts General Laws Part IV, Title I, Chapter 269, Section 10
A first-time offender could walk out with a small fine. Someone with a prior felony is looking at mandatory state prison time with no judicial workaround.
Who Is Exempt
The statute’s “except as provided by law” language carves out people who need these tools for work. Law enforcement officers, correctional officers, and certain military personnel can carry expandable batons while performing official duties.3Mass.gov. Massachusetts General Laws c. 269 s. 10 – Carrying Dangerous Weapons
Private security is murkier. Whether a security professional can carry a baton depends on their specific authorization, their training, and the scope of their assignment. If you work in security and are thinking about carrying one, get written confirmation from your employer and verify your licensing before you put it on your belt.
Self-Defense Does Not Cancel the Weapons Charge
A common misconception is that using the baton to defend yourself clears the possession charge. It does not. A self-defense claim may defeat an assault or battery charge arising from the confrontation, but it is not a defense to carrying the weapon.
Prosecutors treat the two as separate matters. You can win the fight charge entirely and still be convicted for having the baton on you. Given that the possession charge alone can carry state prison time, carrying an expandable baton in Massachusetts for personal protection means accepting serious criminal exposure as the price of carrying it.
Federal Buildings and Air Travel
Even where Massachusetts law leaves room, federal rules add another layer. Under 18 U.S.C. § 930, bringing any “dangerous weapon” into a federal building is a crime punishable by up to a year in prison. The statute defines “dangerous weapon” as any instrument “readily capable of causing death or serious bodily injury,” which comfortably covers an expandable baton.4GovInfo. 18 U.S.C. 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities A federal courthouse pushes the maximum to two years.
For flights, the TSA bars expandable batons (listed under “night sticks”) from carry-on luggage but allows them in checked bags.5Transportation Security Administration. Night Sticks Checking it legally for the flight does not clear you to carry it when you land; the destination state’s weapon laws take over at that point.