A California compliant firearm is one that satisfies every layer of state law that applies to it: the handgun model appears on the state’s approved roster, a semiautomatic centerfire rifle either strips out the restricted features or uses a fixed magazine, no magazine holds more than 10 rounds, the firearm is not one of the categories banned outright, and the owner has cleared the state’s purchase, serialization, ammunition, transport, and storage requirements. Miss any of these and you can move from lawful owner to felony defendant without changing anything about the gun in your safe.
Handguns Must Be on the Roster
Since January 1, 2001, a licensed dealer in California can only sell a handgun model that has been tested and listed on the state’s Roster of Certified Handguns. The Department of Justice maintains the list, and each model must pass firing, safety, and drop tests at an independent laboratory before it goes on.1State of California – Department of Justice – Office of the Attorney General. Handguns Certified for Sale A pistol the manufacturer never submits, or one that fails a test, cannot be sold new through a dealer to the general public no matter how common it is elsewhere.
Semiautomatic pistols added to the roster after January 2007 also have to include a chamber load indicator that shows when a round is in the chamber and a magazine disconnect that prevents firing when the magazine is out. Many manufacturers have not redesigned their pistols to add both, which is why the selection of new-in-box handguns for California buyers is narrower than in most states.
Microstamping is on the way but not yet enforced. Senate Bill 452, signed in September 2023, restructured the requirement and pushed the earliest enforcement date to January 1, 2028, contingent on the DOJ confirming that microstamping components are technologically viable and commercially available.2State of California – Department of Justice – Office of the Attorney General. Senate Bill (SB) 452 Microstamping No dealer is required to sell only microstamping-enabled pistols today.
Rifles: Feature Restrictions and Two Compliance Paths
Penal Code 30515 classifies a semiautomatic centerfire rifle as an assault weapon if it has a detachable magazine and any one of these features:3California Legislative Information. California Code PEN 30515
- A pistol grip that protrudes conspicuously beneath the action
- A thumbhole stock
- A folding or telescoping stock
- A grenade or flare launcher
- A flash suppressor
- A forward pistol grip
A semiautomatic centerfire rifle with a fixed magazine over 10 rounds also qualifies as an assault weapon, as does any semiautomatic centerfire rifle under 30 inches in overall length.
Featureless Builds
The first way to comply is to remove every restricted feature. A featureless rifle typically substitutes a fin grip or similar ergonomic modification for the pistol grip, uses a fixed-length stock, and swaps a flash suppressor for a muzzle brake. Because none of the listed features is present, the rifle can legally use a standard detachable magazine and reload the usual way. This is the more common route for owners who want quick magazine changes.
Fixed-Magazine Builds
The alternative is to make the magazine “fixed,” which the statute defines as one that cannot be removed without disassembling the firearm’s action. Aftermarket devices accomplish this by requiring the upper and lower receivers to be separated before the magazine release works. In exchange for slower reloading, the rifle can keep its pistol grip, adjustable stock, and other features that a featureless build has to give up.
Consequences of Getting It Wrong
Selling, distributing, or importing an assault weapon into California is a felony carrying four, six, or eight years in state prison.4California Legislative Information. California Code PEN 30600 Simple possession can be charged as a misdemeanor punishable by up to a year in county jail or as a felony.5California Legislative Information. California Code PEN 30605
Shotguns: The Two-Feature Combination
A semiautomatic shotgun becomes a classified assault weapon only when it has both a folding or telescoping stock and a pistol grip (a thumbhole stock or vertical handgrip counts as a pistol grip). One of those features alone is not enough; the combination is. Any shotgun with a revolving cylinder is classified as an assault weapon regardless of other features. For most owners, staying compliant means avoiding that specific combination and keeping magazine capacity at 10 rounds or fewer.
The 10-Round Magazine Ceiling
California prohibits the sale, importation, and manufacture of any magazine that holds more than 10 rounds, and the rule applies across every firearm type. Under Penal Code 32310, selling, importing, or manufacturing a large-capacity magazine can result in up to a year in county jail or a state prison term. Possession alone can be charged as an infraction with a $100 fine per magazine or as a misdemeanor with up to a year in jail plus $100 per magazine.6California Legislative Information. California Code PEN 32310
The prohibition excludes .22 caliber tubular feeding devices, magazines permanently altered to hold no more than 10 rounds, and tubular magazines in lever-action firearms. Everything else over 10 rounds is covered.
Firearms You Cannot Own at All
Some categories cannot be made compliant. They are banned outright:
- Short-barreled rifles: any rifle with a barrel under 16 inches or overall length under 26 inches.7California Legislative Information. California Code PEN 17170
- Short-barreled shotguns: any shotgun with a barrel under 18 inches or overall length under 26 inches.8California Legislative Information. California Code PEN 17180
- Zip guns and other improvised weapons not originally designed or imported by a licensed manufacturer.9California Legislative Information. California Code PEN 17360
- Machine guns (fully automatic firearms).
- Silencers and suppressors.
Machine guns and silencers are regulated federally under the National Firearms Act, which requires registration and, for machine guns, a $200 excise tax.10Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act Federal registration does not override California’s ban; civilian possession here remains a felony.
Home-Built Firearms Must Be Serialized
Anyone building a firearm from parts or an unfinished frame in California must apply to the DOJ for a unique serial number before manufacturing or assembling it, and the number has to be permanently engraved on the frame or receiver within 10 days of completion. For polymer builds, at least 3.7 ounces of 17-4 PH stainless steel must be embedded in the plastic, with the serial number engraved on the metal.11California Legislative Information. California Code PEN 29180 Anyone already possessing an unserialized firearm or precursor part was required to apply for a serial number by January 1, 2024. New residents have 60 days after arriving. Possessing an unregistered, unserialized firearm is a criminal offense.
Two 2026 laws expand these rules. Assembly Bill 1263 and Senate Bill 704, effective January 1, 2026, add consumer notice, age verification, and ID requirements to sales of firearm accessories, firearm manufacturing machines, and barrels, and create criminal penalties for facilitating unlawful manufacture and for distributing digital firearm manufacturing code to unlicensed individuals.12State of California – Department of Justice – Office of the Attorney General. Attorney General Bonta Releases Informational Bulletin on New Ghost Gun Laws Coming into Effect January 1, 2026
Buying the Firearm
Every dealer purchase runs through the same track, and the process takes at least 10 days from beginning to end.
Age and Eligibility
Dealers cannot sell any firearm to a person under 21, with a limited exception for the sale of certain long guns (other than handguns and semiautomatic centerfire rifles) to licensed hunters who are at least 18. Anyone prohibited under state or federal law from possessing a firearm, including people with felony convictions, certain misdemeanor convictions, active restraining orders, or narcotic addictions, cannot buy or possess one.13California Legislative Information. California Code PEN 29800
Firearm Safety Certificate
You need a valid Firearm Safety Certificate before you can take possession of any firearm. The FSC is issued after passing a 30-question written test on firearm safety and California law, administered by a DOJ-certified instructor (usually at a gun store). A score of at least 23 out of 30, or 75%, is required.14State of California – Department of Justice – Office of the Attorney General. Firearm Safety Certificate Program FAQs
DROS and the 10-Day Wait
The Dealer’s Record of Sale is both the registration form and the background check application. The buyer pays a $31.19 DROS fee, and once the form is submitted electronically, a mandatory 10-day waiting period runs from the exact time of submission.15New York Codes, Rules and Regulations. California Code of Regulations 4001 – DROS Fees During the wait, the DOJ checks criminal databases and restraining order records. After the check clears, the buyer has a limited window to pick up the firearm before the DROS expires and the process restarts.
Ammunition Has Its Own Background Check
California does not stop at regulating the gun. Every ammunition purchase must go through a licensed California ammunition vendor in person, with a background check at the point of sale. You cannot order ammunition online for direct delivery to your home.16State of California – Department of Justice – Office of the Attorney General. Ammunition Purchase Frequently Asked Questions The eligibility check comes in three versions:
- Standard check, $5, for buyers already in the DOJ’s Automated Firearms System from a prior California firearm purchase or registration.
- COE verification, $5, for buyers holding a current Certificate of Eligibility.
- Basic check, $19, for buyers not in the Automated Firearms System, such as first-time gun owners. This check takes longer and has to be repeated on each purchase until the buyer registers a firearm.
You have to be at least 21 to buy handgun ammunition, at least 18 for long gun ammunition, and you need a valid California driver’s license, state ID, or military ID. An approved eligibility check is good for 30 calendar days. Transfers between immediate family members and ammunition bought and used entirely at a shooting range are exempt from the background check.
Transport Rules
How the firearm rides in the car matters as much as how it is built. A handgun being transported in a vehicle must be unloaded and locked in the trunk or in a locked container. A glove box or center console does not count, even one with a factory lock. The container must fully enclose the firearm and be secured with a padlock, key lock, or combination lock.17California Legislative Information. California Code PEN 25610 Vehicles without a trunk, such as SUVs and hatchbacks, need a separate hard-sided locked case placed as far from the driver as possible.
Ammunition can share the locked container but cannot be loaded in the gun or in an attached magazine during transport. Within 1,000 feet of a school, the federal Gun-Free School Zones Act tightens the rule further, requiring all firearms, including rifles and shotguns, to be in a locked container or locked firearms rack.
Storage at Home
Penal Code 25100 creates three degrees of criminal storage, all keyed to whether a child or prohibited person gains access to a carelessly stored gun:18California Legislative Information. California Code PEN 25100
- First degree, when access leads to death or great bodily injury.
- Second degree, when access causes lesser injury or the firearm is carried to a public place.
- Third degree, when the firearm is negligently stored where the owner knows or should know a child is likely to reach it, even without injury.
All three turn on whether the owner knew or should have known a child or prohibited person was likely to get to the gun. A California-approved lock box, gun safe, or trigger lock removes most of that exposure.
Losing the Right to Possess
Compliance is not permanent. Under Penal Code 18150, a court can issue a Gun Violence Restraining Order removing firearms and ammunition from a person who poses a significant danger of injury to themselves or others. Family members, roommates, employers, coworkers, dating partners, and law enforcement officers can all petition. Once a temporary GVRO issues, the person has 24 hours to surrender all firearms, and a hearing is set within 21 days to decide whether a longer order should follow.