Is Switchblades Legal in Montana After the 2026 Law Changes?

Yes, Montana generally permits switchblades under state law, but local ordinances and federal restrictions may apply. The Montana Department of Justice has not enacted statewide bans, though cities like Billings and Missoula impose additional regulations. Federal law under the Switchblade Knife Act of 1958 restricts interstate commerce of blades exceeding 2 inches, complicating mail-order purchases.


Key Regulations for Switchblades in Montana

  • State Law: Montana Code Annotated § 45-8-317 does not prohibit switchblades, but municipalities may regulate their carry or sale. The 2024 legislative session introduced HB 412, which sought to preempt local restrictions, but it stalled in committee.
  • Federal Restrictions: The Switchblade Knife Act prohibits the manufacture, sale, or transport of switchblades across state lines if blades exceed 2 inches. This impacts online purchases shipped to Montana addresses.
  • Local Ordinances: Cities like Billings (City Code § 18-501) require permits for concealed carry of switchblades, while Missoula’s municipal code bans their possession in public parks. Always verify county-specific rules before possession.

Compliance Note: While state law permits switchblades, carriers must navigate municipal variances and federal shipment prohibitions. The Montana Sheriffs and Peace Officers Association (MSPOA) advises consulting local law enforcement for jurisdiction-specific guidance. Recent 2026 compliance shifts, including potential updates to HB 412, warrant ongoing monitoring of legislative developments.