California gun show laws require every firearm sale to run through a licensed dealer with a full background check, impose a 10-day waiting period before pickup, bar sales on state-owned property, add a separate background check for ammunition, and prohibit entire categories of firearms, magazines, and accessories outright. If you’re planning to buy or sell at a California show, the rules below are the ones that will shape the trip.
Every Firearm Sale Goes Through a Licensed Dealer
There is no private-sale exception at a California gun show. Whether the firearm is a gift, a loan, or a sale between strangers, the transfer has to be processed by a federally licensed firearms dealer.
Penal Code section 28050 sets the procedure: the seller delivers the firearm to the dealer, the dealer holds it, and the dealer releases it to the buyer only after confirming the buyer isn’t prohibited from owning firearms.1California Legislative Information. California Penal Code 28050 – Procedure for a Private Party Firearms Transaction The background check runs through the state’s Dealer Record of Sale (DROS) system, which submits electronically to the California Department of Justice and checks both state records and the federal NICS database.2Legal Information Institute. California Code of Regulations Title 11 4230 – Delivery of Firearms Following DROS Submission and Suspension Skipping the dealer exposes both buyer and seller to criminal liability.
The 10-Day Wait, the Safety Certificate, and the Fees
A clean background check doesn’t mean same-day pickup. The DOJ holds every transaction in “Pending” status for 10 full days before the buyer can take possession, and the clock runs regardless of how fast the check clears.2Legal Information Institute. California Code of Regulations Title 11 4230 – Delivery of Firearms Following DROS Submission and Suspension Federal law would let a dealer release the firearm after three business days without an FBI decision, but California’s 10-day rule overrides that at the state level.3Federal Bureau of Investigation. About NICS Plan on a return trip.
Buyers also need a valid Firearm Safety Certificate before completing any purchase. The certificate requires passing a written test administered by a licensed dealer.
State-mandated fees for a private-party transfer at a gun show add up like this:
- DROS fee: $31.19
- Firearm safety fee: $1.00
- Firearm safety enforcement fee: $5.00
- Dealer processing fee: $10.00 per firearm
That’s $47.19 per firearm set by the state.4California Department of Justice. Department of Justice Fees Dealers can add handling charges on top, so the real cost is often higher.
Shows Can No Longer Be Held on State Property
Penal Code section 27573 prohibits the sale of firearms, firearm precursor parts, and ammunition on any property owned, leased, or operated by the state. That sweeps in most county fairgrounds, which were historically the default venues, along with other state-managed facilities. The 9th Circuit Court of Appeals upheld the ban in September 2024.5California Department of Justice. Amended Notice Regarding Prohibition of Gun Sales on State Property
Shows now happen almost exclusively at private convention centers and event halls. If you see one advertised at a fairground, verify what’s actually being sold on-site; the event itself may be legal, but firearm and ammunition sales on that property likely are not.
What You Can’t Buy, Even Through a Dealer
Several categories are off the table regardless of who processes the paperwork.
Assault Weapons and .50 BMG Rifles
Penal Code section 30600 makes it a felony to sell, give, lend, or display an assault weapon or .50 BMG rifle. The statute reaches “exposing for sale,” so showing a prohibited rifle at a booth can trigger prosecution. A conviction carries four, six, or eight years in state prison, and the penalty falls on the vendor as well as the buyer.6California Legislative Information. California Penal Code 30600 – Assault Weapons and .50 BMG Rifles
Large-Capacity Magazines
Any ammunition feeding device holding more than 10 rounds is banned. Penal Code section 32310 makes it illegal to buy, sell, give, lend, or receive one, and possession is separately prohibited regardless of when the magazine was acquired.7California Legislative Information. California Penal Code 32310 You won’t see 15- or 30-round magazines on sale.
Handguns Not on the DOJ Roster
California maintains a Roster of Handguns Certified for Sale. A new handgun model must pass firing, safety, and drop tests and be certified by the DOJ before a dealer can sell it as new stock.8State of California – Department of Justice – Office of the Attorney General. Handguns Certified for Sale Private-party transfers, curios or relics, and certain single-action revolvers are exempt, so some off-roster models still change hands at shows through person-to-person sales processed by a dealer.
Ammunition Has Its Own Background Check
Buying ammunition triggers a separate check from the firearm DROS process. Every sale goes through a licensed ammunition vendor who runs the buyer’s information through the DOJ’s authorization system before handing over a single round.9California Legislative Information. California Penal Code 30370-30372 – Ammunition Purchase Authorizations
Cost and speed depend on whether you already have a firearm registered in the Automated Firearms System:
- Standard Ammunition Eligibility Check: $1 and often processes while you wait if you already have a firearm registered in the AFS.10State of California – Department of Justice – Office of the Attorney General. Regulations – Ammunition Purchase Fee
- Basic Ammunition Eligibility Check: $19 and can take several days to complete if you’re not in the AFS.11California Department of Justice. Ammunition Authorization Program Final Statement of Reasons
First-time buyers without a registered firearm can face a multi-day wait just for a box of ammunition. Out-of-state visitors who expect ammunition to be a grab-and-go purchase are often caught off guard.
Age Limits
Federal law sets the floor at 21 for handguns from a licensed dealer and 18 for long guns. California also has state-level age restrictions on certain semi-automatic rifles that go beyond the federal minimums, so buyers between 18 and 20 should confirm eligibility for the specific firearm they want before the trip. No one under 18 can enter a California gun show without a parent, grandparent, or legal guardian.12LegiScan. California AB 2552 – Gun Show and Event Requirements
Straw Purchases Carry Heavy Federal Penalties
Buying a firearm on behalf of someone who can’t legally buy one is a federal felony, and ATF agents watch gun shows for it. A conviction carries up to 15 years in prison and a $250,000 fine. If the firearm is later used in drug trafficking, terrorism, or another felony, the maximum rises to 25 years.13Bureau of Alcohol, Tobacco, Firearms and Explosives. Don’t Lie for the Other Guy These penalties stack with any California state charges. Lying on the federal form about who the actual buyer is — even as a favor to a friend — is how people walk away with felony convictions.
What You’ll See at the Show
Operators have their own obligations under Penal Code sections 27200 through 27350. Expect signage at every public entrance covering the dealer-transfer rule, the under-18 escort requirement, safe storage warnings, and parent-liability penalties, along with mandatory firearm-clearing stations at the door and visible security throughout.12LegiScan. California AB 2552 – Gun Show and Event Requirements A California gun show feels heavily supervised compared with shows in less regulated states, and that supervision is the point.