Yes, the Sig Sauer P320 is California legal in three specific configurations currently on the state’s certified handgun roster: the P320-M18 California, the P320-XFULL California, and the P320-XFIVE LEGION California.1SIG SAUER. California Compliant Any licensed California dealer can sell you one of these directly. Other P320 variants are off-roster and can only be acquired through a private party transfer or a qualifying family transfer.
Which P320 Models You Can Buy at a Dealer
California’s certified handgun roster is the list of handguns approved for retail sale to the general public, maintained by the Department of Justice. No dealer can sell a handgun to a civilian unless that exact make and model appears on the roster.2California Department of Justice – Office of the Attorney General. Handguns Certified for Sale For years no P320 appeared on the list, which is why SIG’s California-specific submissions matter.
The three current entries are the P320-M18 California, the P320-XFULL California, and the P320-XFIVE LEGION California. Each carries a distinct SKU, and the model number on the box must match the roster entry exactly for a dealer to complete the sale. Before heading to a shop, search the DOJ’s online roster database by manufacturer to confirm the specific SKU is still listed; the roster changes.
What Makes These Models California-Compliant
Any semi-automatic pistol newly added to the roster after July 1, 2022 must include a chamber load indicator and, if it accepts a detachable magazine, a magazine disconnect mechanism.3California Legislative Information. California Code PEN 31910 All three California P320s meet both.
The chamber load indicator is a small tab on top of the slide near the ejection port. When a round is chambered, the tab rises so you can see or feel it. The magazine disconnect prevents the pistol from firing when the magazine is removed, even if a round remains chambered. SIG also adds a manual thumb safety on the frame of these variants. The thumb safety isn’t a statutory roster requirement; it’s a design choice SIG made for the California lineup.
Standard P320s sold in other states typically lack the magazine disconnect, often lack the loaded chamber indicator, and usually lack the manual safety. An out-of-state P320 is not automatically California-compliant and cannot be substituted for the roster-listed SKU.
All three California variants are built around the P320’s Firearm Control Unit, the removable serialized chassis that is legally the firearm. The FCU is what makes the P320 modular, but the California FCU is designed to work with the required safety components. Swapping a California FCU into a non-compliant configuration can create legal problems, so treat the gun as a complete package rather than a parts kit.
Buying an Off-Roster P320 Variant
If the configuration you want — a Nitron Compact, a standard-frame model, anything SIG hasn’t submitted — isn’t on the roster, you still have legal routes. Neither is as simple as walking into a store.
Private Party Transfer
The roster restriction applies to dealer sales. Person-to-person transfers between California residents are exempt when conducted through a licensed dealer.4California Legislative Information. California Code Penal Code 32110 Both parties meet at a dealer, the dealer runs the DROS and background check, and the standard 10-day waiting period applies. The dealer also charges a processing fee on top of the DROS fee, and the amount varies by shop.
Many off-roster handguns in the California private market originate with law enforcement officers, who can purchase off-roster handguns for personal use and later resell them to eligible buyers through a PPT.5California Department of Justice – Office of the Attorney General. State Exemptions for Authorized Peace Officers Supply is limited to whatever officers choose to sell, so off-roster P320 variants typically carry a significant premium over what they cost in other states.
Intrafamilial Transfer
Transfers between parents, children, grandparents, and grandchildren are exempt from the roster. If the family member giving you the firearm is also a California resident, the transfer is reported directly to the DOJ using the appropriate form, with a $19 processing fee. If the relative lives out of state, federal law requires the handgun to be shipped to a California dealer for processing, which brings in the DROS fee and the dealer’s transfer charge. Either way, you still complete a background check and the 10-day waiting period applies.
What It Costs and How Long It Takes
Before you can buy any firearm in California, you need a valid Firearm Safety Certificate. It requires passing a written test given by a DOJ Certified Instructor, usually available at local gun shops. The test costs $25, covers two attempts, and the certificate is good for five years.6California Department of Justice – Office of the Attorney General. Frequently Asked Questions
Every transaction runs through a Dealer Record of Sale. The DROS fee is $31.19, whether you buy one firearm or several in the same transaction.7New York Codes, Rules and Regulations. 4001 DROS Fees California also imposes an 11% excise tax on all retail firearm and ammunition sales, in effect since July 2024.8California Department of Tax and Fee Administration. California Firearm Excise Tax Law – Sec 36011 On an $800 pistol, that adds $88 before sales tax. The sticker price is a starting point.
Once DROS is submitted, the mandatory 10-day waiting period begins and no firearm can be delivered until it ends.9California Legislative Information. California Code Penal Code 27540 This applies to every transfer type: new retail, private party, or family.
Owning a P320 Legally in California
Ten-Round Magazine Cap
However you acquired the pistol, you cannot possess a magazine holding more than 10 rounds in California. Manufacturing, importing, selling, or buying a large-capacity magazine is punishable by up to one year in county jail or state prison. Simple possession is charged as either an infraction with a fine up to $100 per magazine, or a misdemeanor carrying up to one year in county jail, a $100 fine per magazine, or both.10California Legislative Information. California Code Penal Code 32310
Standard P320s ship with 17- or 21-round magazines depending on the model. California variants come with 10-rounders. If a private transfer includes standard-capacity magazines, you need to sell them to a dealer, send them out of state, or surrender them to law enforcement. This is the single most common compliance problem P320 owners run into.
Don’t Thread the Barrel
California defines certain features on a semi-automatic pistol as assault weapon characteristics. A semi-automatic pistol with a detachable magazine and a threaded barrel capable of accepting a suppressor, flash suppressor, or forward handgrip qualifies as an assault weapon under state law.11California Legislative Information. California Code PEN 30515 Possessing an assault weapon can be charged as a felony punishable by up to one year in county jail or a state prison term.12California Legislative Information. California Code PEN 30605
The P320’s modularity makes it easy to swap parts, which is where owners get into trouble. Installing a threaded barrel converts a legal pistol into a felony. Other features that trigger assault weapon classification include a second handgrip, a barrel shroud other than the slide, or the ability to accept a magazine outside the pistol grip. Keep the barrel standard and unthreaded.
Safe Storage
California imposes criminal liability if you store a loaded firearm where a child under 18 is likely to access it, with charges escalating based on what the child does with the gun. Separately, failing to store any firearm in a locked container or with a locking device when it isn’t in your immediate possession is a misdemeanor.13California Legislative Information. California Code Penal Code 25135 A DOJ-approved safe or lock box satisfies the requirement, as does a California-approved cable lock, and dealers must include a lock with every firearm sold. Because the FCU is the serialized firearm, the FCU itself must be secured even when separated from a grip module or slide.
What’s Coming: Roster Attrition and Microstamping
The California roster has been shrinking for years, and a 2022 law accelerated the trend. Every time a new semi-automatic pistol is added, three older models lacking the required chamber load indicator or magazine disconnect are removed, starting with the earliest entries.3California Legislative Information. California Code PEN 31910 The roster is designed to gradually eliminate every semi-automatic pistol that doesn’t meet current safety standards.
Microstamping is the other variable. Senate Bill 452, signed in 2023, set a phased-in mandate: starting January 1, 2028, newly manufactured semi-automatic pistols sold through dealers would need to be microstamping-enabled, but only if the DOJ first confirms the technology is commercially viable and available.14California Department of Justice – Office of the Attorney General. Senate Bill 452 Microstamping In July 2025, the DOJ confirmed the technology works. A commercial availability determination is due by July 1, 2027. If that determination is made, any pistol newly added to the roster after January 2028 would need microstamping capability, which could narrow the list of manufacturers willing to submit new California models — SIG included. If a particular P320 variant matters to you, the window to buy it on-roster may not stay open indefinitely.