Automatic weapons are not legal for civilians in California. State law bans the possession, transport, sale, manufacture, and conversion of machine guns, and it does not recognize the federal exception that lets civilians in most other states own pre-1986 machine guns registered under the National Firearms Act. The only path to lawful possession is a Dangerous Weapons Permit from the California Department of Justice, and the qualifying reasons are limited to specific professional uses like law enforcement supply, government contract work, and film production. Personal ownership, collecting, and recreational shooting do not qualify.
What California Counts as a Machine Gun
Penal Code 16880 defines a machine gun as any weapon that fires more than one shot with a single pull of the trigger without manual reloading between shots.1California Legislative Information. California Penal Code 16880 – Definition of Machinegun That functional test is what separates a machine gun from a semi-automatic firearm, which requires a separate trigger pull for each round. The definition also reaches weapons that can “readily be restored” to fire automatically, so a deactivated machine gun that could be reassembled still counts.
The ban is broader than complete firearms. It covers the frame or receiver of a machine gun, any combination of parts that could be assembled into one if a single person controls them, and any part designed exclusively to convert an ordinary firearm into a machine gun.1California Legislative Information. California Penal Code 16880 – Definition of Machinegun A conversion kit by itself, without a host weapon, is enough to create criminal liability.
Pre-1986 Federal Registration Does Not Help You Here
Federal law closed civilian transfers of newly manufactured machine guns in 1986, but machine guns lawfully owned before that date remain transferable between civilians in most states through the National Firearms Act registration system.2Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts That registration involves a $200 federal tax, an ATF background check, and listing on the National Firearms Registration and Transfer Record.3Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act
California does not honor that grandfathering rule. A pre-1986 machine gun registered with the ATF in another state is still contraband inside California absent a state Dangerous Weapons Permit, and the state’s permit system has no category for personal collecting or recreational use. The collection exception that exists for certain destructive devices explicitly excludes machine guns.4Legal Information Institute. California Code of Regulations Title 11 Section 4128 – General Civilian ownership is effectively impossible regardless of the weapon’s federal status.
Penalties for Possession, Sale, or Conversion
Under Penal Code 32625(a), possessing or knowingly transporting a machine gun without authorization is a wobbler. Prosecutors can charge it as a misdemeanor or a felony, and a felony conviction carries 16 months, two years, or three years in county jail, a fine of up to $10,000, or both.5California Legislative Information. California Penal Code 32625 – Machinegun Penalties The sentence is served in county jail rather than state prison under the state’s realignment structure.
Selling, offering to sell, manufacturing, or intentionally converting a firearm into a machine gun carries heavier penalties. Penal Code 32625(b) sets a sentencing range of four, six, or eight years in county jail for those offenses, with no misdemeanor option.7California Legislative Information. California Penal Code 32625 – Machinegun Penalties
A felony conviction also triggers a lifetime ban on possessing any firearm in California. Non-citizens may face deportation consequences or problems with future immigration applications. Downstream effects on employment, housing, and professional licensing often outlast the sentence itself.
The Narrow Permit Exception
The Department of Justice can issue a Dangerous Weapons Permit for machine gun possession, but only to an individual at least 18 years old who shows “good cause” by clear and convincing evidence that there is a genuine market or public need.6California Legislative Information. California Penal Code 32650 – Machinegun Permits The recognized reasons spelled out in state regulations are:
- Selling to or manufacturing machine guns for law enforcement, military branches, or other permit holders.
- Training, research, development, or manufacturing done under a government contract.
- Use as props in commercial film, television, or other commercial entertainment.
- Repairing or servicing machine guns lawfully possessed by others.
- Use by members of government military agencies in sanctioned activities.
Personal protection, recreational shooting, investment collecting, and historical preservation are not on the list. Regulations specifically state that the collection exception available for certain destructive devices “shall not be allowed for short-barreled shotguns, short-barreled rifles, machineguns or assault weapons.”4Legal Information Institute. California Code of Regulations Title 11 Section 4128 – General If your reason for wanting a machine gun does not serve one of those narrow professional purposes, the DOJ will deny the application.
Bump Stocks, Trigger Cranks, and Rate-of-Fire Devices
California also bans devices that increase a semi-automatic firearm’s rate of fire. Penal Code 16930 defines “multiburst trigger activators” to include bump stocks, which use spring or piston mechanisms to harness recoil and slide the weapon against a stationary trigger finger; burst triggers, which push the shooter’s finger back and forth inside the trigger guard; trigger cranks, which activate the trigger by turning a crank handle; and aftermarket binary or multi-round triggers that fire more than one round per trigger pull.8California Legislative Information. California Penal Code 16930 – Definition of Multiburst Trigger Activator
Under Penal Code 32900, manufacturing, importing, selling, or possessing any of these devices is illegal even when the device is not attached to a firearm.9California Legislative Information. California Penal Code 32900 – Multiburst Trigger Activator The offense is a wobbler: a misdemeanor conviction carries up to one year in county jail, and a felony conviction carries 16 months, two years, or three years.
Forced Reset Triggers
Forced reset triggers deserve a separate note because their federal status recently changed. A May 2025 federal DOJ settlement established that FRTs are not machine guns under federal law, and they can now be purchased legally in most states. California’s Attorney General has said the federal change does not alter state law. The AG’s office concluded that FRTs are, “at a minimum,” multiburst trigger activators under Penal Code 16930, making them illegal to own, sell, import, or manufacture under Penal Code 32900.10California Department of Justice. Attorney General Bonta: Forced Reset Triggers Remain Illegal Under California Law Ordering an FRT online from an out-of-state retailer and having it shipped into California carries the same criminal exposure as possessing a bump stock.