A lot of “ghost gun” cases don’t start with a gun at all. They start with a package at the door, a part in the mail, a file shared in a group chat, or a message that sounds like “I can help you get this done.”

California is tightening the screws on that whole ecosystem. Two new laws, AB 1263 and SB 704, take effect on January 1, 2026. They expand what regulators and prosecutors can treat as unlawful firearm manufacturing activity, and they add new rules for certain firearm-related products that are often tied to homemade or unserialized firearms.

If you’re being investigated or charged under these new rules, the stakes are real. These cases move fast, rely heavily on digital evidence, and often include multiple charges that build off the same facts.

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What changes on January 1, 2026

AB 1263 and SB 704 do two big things starting January 1, 2026:

They create new ways to charge people who help someone else unlawfully manufacture a firearm, even if that person is not the one physically making it.
They impose new restrictions and accountability measures around the sale and delivery of certain firearm-related products commonly used in homemade firearm builds.

At a high level, you should expect more investigations tied to:

Online sales and shipping records
Messages, posts, DMs, and file sharing
Purchases of parts and tools that prosecutors argue were intended for unlawful manufacturing
Links between “who bought what” and “who built what”

SB 704 makes firearm barrel transactions more restrictive

Starting January 1, 2026, SB 704 creates new requirements for the sale or transfer of a firearm barrel that is not attached or affixed to a firearm.

The in-person, dealer-completed transaction rule

Under the new rule, barrel sales and transfers generally must be completed in person through a licensed firearms dealer. That matters in two common scenarios:

Private-party barrel transactions that used to be handled informally
Online barrel purchases shipped directly to a buyer’s home

If the barrel is sold by someone who is not a licensed firearms dealer (for example, an out-of-state or online seller), the barrel generally must be shipped to a licensed California dealer so the in-person transaction and final delivery can be completed there.

What counts as a “firearm barrel” can be broader than people assume

The statutory definition is not limited to a finished, drop-in barrel. It can include items that have reached a stage where they can be readily completed or converted into a usable barrel, or items marketed or sold to become a barrel once completed.

That breadth matters because “it was just a blank” or “it wasn’t installed yet” is not always the safe explanation people assume it is.

Penalties tied to selling barrels outside the new process

SB 704 also targets possession of a firearm barrel with intent to sell or offer to sell it in violation of the new requirements.

Penalty exposure is tiered:

A first or second violation is punishable as a misdemeanor.
A third or subsequent violation can be charged as a misdemeanor or a felony.

SB 704 also has additional requirements that begin July 1, 2027, including a firearm eligibility check and a record-of-sale submission for barrel transactions. But the major practical change for most people begins January 1, 2026: don’t expect barrel transactions to be treated like casual parts sales.

AB 1263 creates a new crime for facilitating unlawful firearm manufacturing

AB 1263 adds a new Penal Code section that makes it a misdemeanor to knowingly or willfully cause another person to engage in the unlawful manufacture of firearms, or to knowingly or willfully aid, abet, promote, or facilitate that unlawful manufacture.

This is a meaningful shift. Prosecutors no longer have to treat the “helper” as a side character. The help itself can become the charge.

What “facilitating” can look like in a real investigation

In practice, these cases often focus on behavior that prosecutors can frame as enabling someone else to manufacture a firearm unlawfully, such as:

Providing parts, tools, or kits tied to illegal manufacturing
Coordinating purchases, deliveries, or meetups connected to a build
Sharing plans, files, or instructions in a way prosecutors claim was intended to enable illegal manufacturing
Using platforms, groups, or online accounts to promote or support unlawful builds
Acting as the “connector” between a builder and the materials needed

A key point: the statute is not limited to hands-on machining. It is aimed at the network around illegal manufacturing.

The meaning of “knowingly or willfully” matters

This new offense is not supposed to criminalize accidents or innocent misunderstandings. The prosecution still has to prove the mental state: that the person acted knowingly or willfully.

That creates defense room when the facts show:

Lack of knowledge about what the other person intended to do
A lawful purpose for the purchase, sale, or transfer
Ambiguous communications that do not show intent to facilitate illegal manufacturing
Overreach where investigators interpret normal conduct in the worst light

What the law treats as “unlawful manufacture”

For purposes of this new offense, “unlawful manufacture of firearms” is defined to include several categories of illegal manufacturing activity. The categories include manufacturing by prohibited people, manufacturing for unlawful sale or transfer, and manufacturing that involves banned configurations or items.

You do not need to be charged with every underlying category for prosecutors to use the definition as a roadmap. In many cases, the state’s theory becomes: the other person’s manufacturing was “unlawful” under one of these categories, and you helped make it happen.

AB 1263 expands “digital firearm manufacturing code” exposure

AB 1263 also expands how California defines “digital firearm manufacturing code” for civil enforcement purposes and broadens who can be sued.

The definition becomes wider

The updated definition covers digital instructions used to manufacture or produce not only a firearm or precursor parts, but also items that prosecutors and regulators see as closely tied to illegal builds and dangerous modifications.

This matters because “it was just a file” or “it was just a link” is often the center of these cases. Digital evidence is easy to save, easy to screenshot, and easy to misinterpret without context.

More people can bring lawsuits

California law already allowed certain government actors to bring civil actions tied to unlawful distribution of digital firearm manufacturing code. AB 1263 expands the concept by providing a private right of action for harm caused by the unlawful distribution.

That means your exposure may not be limited to the criminal case. Civil claims and injunction efforts can follow, especially where a prosecutor believes there is broader distribution.

Online platform owners can become targets

AB 1263 also adds a rebuttable presumption aimed at people who own or help manage a website or platform that makes digital firearm manufacturing code available and, under the totality of the circumstances, encourages users to upload, disseminate, or use that code.

This can matter even when the platform owner claims they were “just hosting.” The state may treat platform management decisions, moderation choices, and how content is presented as evidence of encouragement.

AB 1263 adds new notice, age verification, and delivery requirements for certain products

AB 1263 also updates the Firearm Industry Responsibility Act framework by adding consumer notice and verification requirements tied to the sale or delivery of:

Firearm accessories
Firearm manufacturing machines
Firearm barrels that are unattached to a firearm

What the compliance rules generally require

Beginning January 1, 2026, sellers covered by these rules generally must:

Provide clear notice that certain conduct is generally a crime in California without the required licensing
Receive an acknowledgment from the purchaser that they received and understand the notice
Require proof of age and identity verifying the purchaser is at least 18 years old

For shipment and delivery, the rules generally require:

Labeling that signals signature and ID are required for delivery
Shipping instructions that match the purchaser’s identification address
Proof of identification and purchaser signature at delivery

Violations in this area are typically treated as civil enforcement and liability issues under the industry responsibility framework, but they still matter for criminal cases because they can generate investigative leads, records, and alleged “knowledge” evidence.

Penalties and collateral consequences under the new framework

When people hear “misdemeanor,” they sometimes exhale. In firearms cases, that can be a mistake.

Misdemeanor charges can still carry major consequences

A misdemeanor conviction can still mean:

County jail exposure
Probation with strict terms
Firearm relinquishment conditions
Search terms and electronic device restrictions in some cases
A record that affects employment, licensing, and immigration status

A 10-year firearm and ammunition prohibition can follow certain convictions

AB 1263 also ties certain convictions to a 10-year prohibition on firearm and ammunition possession and acquisition. That prohibition can follow convictions for specified misdemeanor offenses, including the new “facilitating unlawful manufacture” misdemeanor, depending on the charging and conviction date.

In the real world, that collateral consequence can be more disruptive than the headline jail time.

Because SB 704 increases penalties for repeated violations, people who are charged more than once can see the case move from misdemeanor-only exposure into wobbler territory. That changes negotiations, custody exposure, and long-term consequences.

Defense pressure points in ghost gun and unlawful manufacturing cases

These cases feel technical, but the prosecution’s theory often depends on interpretation. That is where defense work lives.

Intent and knowledge

Did the evidence actually show knowing or willful facilitation, or does it show ambiguity, lawful purpose, or misunderstanding? Prosecutors often rely on snippets of messages. Full context can change the meaning.

Attribution and device evidence

Who sent the message, uploaded the file, ran the account, or placed the order? Shared devices, shared logins, spoofed identities, and hacked accounts are real issues in modern investigations.

Overbroad charging based on associations

These cases often involve guilt-by-proximity logic: you were in a group chat, you knew someone who built something, you bought something related, therefore you must have been facilitating. That leap is not proof.

Search and seizure problems

Ghost gun investigations often involve rapid warrants, device seizures, and high-pressure interviews. If the stop was illegal, the warrant was overbroad, or statements were taken improperly, it can change the entire case trajectory.

What to do if you’re being investigated after January 1, 2026

If law enforcement contacts you, serves a warrant, or your employer tells you they’ve been contacted about firearm-related conduct, assume the case is already moving.

Do not try to “explain it” in an interview. Explanations often become admissions.
Do not consent to searches of your phone, cloud accounts, or devices.
Do not delete messages, posts, files, or accounts. Deletion can be framed as consciousness of guilt and can destroy helpful context.
Do not contact other involved people to “get your story straight.” That can be portrayed as intimidation or coordination.
Get a defense lawyer involved immediately, before you lock yourself into a narrative.

Talk to Helfend Law Group about AB 1263 and SB 704 charges

AB 1263 and SB 704 take effect on January 1, 2026, and they change how California investigates and charges cases tied to ghost guns, unlawful firearm manufacturing, and certain firearm-related products. If you are accused of facilitating unlawful manufacture, distributing files or code, or violating the new barrel rules, you need a defense strategy built for modern evidence and aggressive charging.

Contact Helfend Law Group to discuss what happened, understand your exposure under the new laws, and protect yourself before the case escalates.

Published December 30, 2025.