In a major shift, Massachusetts now allows adults aged 21 and over to legally own and carry switchblade (automatic) knives, including OTF models.
This follows an August 2024 Supreme Judicial Court ruling that found the previous ban unconstitutional under the Second Amendment, and new laws that took effect in 2025.
Switchblades with blades over 1.5 inches are now permitted for adults, provided all other laws are followed.
What Knives Are Legal to Own and Carry?
Legal for Most Adults:
- Folding knives, most fixed-blade knives, and now switchblades/automatic knives (if 21+)
- Open carry is generally allowed for legal knives
Still Restricted or Illegal:
- Double-edged knives, daggers, and stilettos may not be carried on your person or in a vehicle
- Knives with a locking blade that can be drawn in the locked position (such as some “quick-draw” designs) are prohibited
- Carrying any knife as a “dangerous weapon” or with intent to use unlawfully is illegal
Where Knives Are Always Banned
- Schools (all levels and campuses)
- Many government buildings
- Carrying any knife in these locations is a crime, regardless of type or blade length.
Concealed vs. Open Carry
- Open carry of legal knives is generally permitted, but avoid carrying large knives in a way that could be seen as threatening.
- Concealed carry is not specifically regulated for legal knives, but carrying a knife as a dangerous weapon or with unlawful intent is prohibited.
Local Laws and Preemption
Massachusetts does not have statewide preemption for knife laws. This means cities and towns can pass stricter rules, so always check local ordinances before carrying a knife.
Age and Permit Restrictions
- Only adults 21 and older may possess and carry switchblades.
- Sales of switchblades to minors remain illegal.
- Law enforcement, military, and certain permit holders may have additional rights or exemptions.
Key Takeaways
| Knife Type | Legal to Own | Legal to Carry | Notes |
|---|---|---|---|
| Folding knives | Yes | Yes | |
| Fixed-blade knives | Yes | Yes | Large knives may draw attention |
| Switchblades/automatics | Yes (21+) | Yes (21+) | Over 1.5″ blade now legal for adults |
| Double-edged/daggers | Yes (maybe) | No | Carrying is restricted |
| In schools/gov’t buildings | No | No | Strictly prohibited |
Massachusetts now allows most adults to own and carry a wider range of knives, including switchblades, but double-edged knives and certain “dangerous weapons” remain restricted. Always avoid carrying knives in schools or government buildings, and check local laws for additional regulations.
Sources:
- https://www.akti.org/state-knife-laws/massachusetts/
- https://www.bladeforums.com/threads/ma-knife-carrying-laws-with-ltc-a.1292790/
- https://www.arenaaccessories.com/Big-Changes-in-Massachusetts-Switchblade-Laws-in-2025–What-You-Need-to-Know_b_16.html
- https://www.tektoknives.com/blogs/news/massachusetts-knife-law-update-switchblades-now-legal
- https://nobliecustomknives.com/us-knife-laws/massachusetts-knife-laws/