Penal Code 32310 PC: Large-Capacity Magazine Laws

California enforces some of the strictest firearm regulations in the United States. Under Penal Code § 32310 PC, it is generally illegal to manufacture, import, sell, give, lend, purchase, receive, or possess any "large-capacity magazine" within the state.

Because ammunition-feeding devices are central to many modern semi-automatic rifles, shotguns, and handguns, Penal Code 32310 PC remains one of the most actively litigated firearm restrictions in federal and state courts.

Despite ongoing Second Amendment legal challenges, California law enforcement agencies continue to strictly enforce PC 32310.

What many gun owners assume is a minor technicality—such as bringing a legally purchased out-of-state magazine across state lines—can swiftly lead to criminal investigations, confiscation, heavy fines, or jail time.

Simply put, California Penal Code § 32310 PC broadly restricts ammunition-feeding devices capable of holding more than ten rounds of ammunition.

Penal Code § 16740 PC Legal Definition

“As used in this code, ‘large-capacity magazine' means any ammunition feeding device with the capacity to accept more than 10 rounds, but shall not be construed to include any of the following: (a) A .22 caliber tube ammunition feeding device. (b) A tubular magazine that is contained in a lever-action firearm. (c) A magazine that has been permanently altered so that it cannot accommodate more than 10 rounds.”

Qualifying Devices and Mechanical Standards

The statutory definition focuses strictly on capacity and capability, rather than whether the device is loaded, attached to a firearm, or actively used. Restricted devices include:

Standard-Capacity & Extended Magazines: Detachable box magazines holding 11 or more rounds for handguns or rifles.
Drum & Belt-Fed Magazines: High-capacity drum magazines or continuous belt feeding mechanisms exceeding 10 rounds.
Fixed Magazines: Internal or fixed feeding tubes/magazines built directly into shotguns or rifles that hold over 10 rounds.
Unassembled Kits & Components: Combinations of magazine parts (body, spring, follower, floor plate) that can be readily assembled into an operational device holding over 10 rounds.

Statutory Penalties for Penal Code 32310 PC

Penalties for PC 32310 depend directly on the specific conduct alleged. California law draws a strict legal distinction between possession versus manufacturing, importing, or transferring high-capacity devices.

Offense & Statutory Provision	Classification	Custodial Exposure	Fine & Additional Consequences
Possession (PC 32310(c))	Infraction	None	Fine up to $100 per magazine; confiscation of property.
Possession (PC 32310(c))	Misdemeanor	Up to 1 year in county jail	Up to $1,000 fine per magazine; informal probation; potential loss of firearm rights.
Manufacturing, Importing, Selling, or Lending (PC 32310(a))	Wobbler (Misdemeanor)	Up to 1 year in county jail	Up to $1,000 fine; criminal record; probation conditions.
Manufacturing, Importing, Selling, or Lending (PC 32310(a))	Wobbler (Felony)	16 months, 2 years, or 3 years in state prison	Up to $10,000 fine; permanent loss of gun ownership rights under PC 29800.

Legal Elements Prosecutors Must Prove

To secure a conviction under California Penal Code 32310 PC, the prosecution must establish three core legal elements beyond a reasonable doubt:

Specific Device Threshold: The device in question met the statutory definition of a "large-capacity magazine" (capable of accepting more than 10 rounds).
Prohibited Conduct: You manufactured, assembled, imported, kept for sale, offered for sale, gave, lent, purchased, received, or possessed the device.
Knowledge (Scienter): You knew—or reasonably should have known—that the device was present and that it possessed the capacity to hold more than 10 rounds.

Understanding Legal Possession

In possession cases under PC 32310(c), prosecutors rely on one of two legal theories:

Actual Possession: The restricted magazine was found directly on your person, in your hands, or within your immediate physical reach.
Constructive Possession: The magazine was found in a location over which you exercised control or right of control (e.g., inside your vehicle, gun safe, or bedroom), even if you were not holding it.

Statutory Exemptions to Penal Code 32310 PC

California statutory law recognizes narrow exemptions where handling or possessing large-capacity magazines is legally authorized:

Active Law Enforcement: Sworn peace officers operating within the course and scope of their official duties or per departmental authorization.
Licensed Firearms Dealers (FFLs): Federal Firearms Licensees holding specialized California high-capacity magazine permits for sale to authorized law enforcement or out-of-state entities.
Armored Vehicle Entities: Authorized personnel operating armored vehicle services during employment.
Historical & Prop Use: Specific licensed entities supplying prop firearms and feeding devices for motion picture, television, or theatrical productions.
Permanently Altered Devices: Magazines permanently modified (via rivets, epoxy blocks, or welded floor plates) so they cannot hold more than 10 rounds without destructive machining.

Strategic Defense Strategies

A strong defense against PC 32310 charges combines technical device evaluations with constitutional and evidentiary challenges:

Lack of Knowledge or Intent: If a magazine was placed in your vehicle, residence, or luggage by another person without your knowledge, the required element of knowing possession is absent.
Device Does Not Exceed 10 Rounds / Compliant Modification: Physical inspection or forensic testing reveals the magazine features an effective, permanent block limiting capacity to 10 rounds or fewer.
No Actual or Constructive Control: Demonstrating that the magazine was located in a shared area (e.g., a shared garage or housemate's closet) where you lacked exclusive access or control.
Unlawful Search and Seizure (Fourth Amendment): If law enforcement located the magazine following an illegal traffic stop, an invalid search warrant, or a warrantless search without consent, your attorney can file a PC 1538.5 Motion to Suppress Evidence to exclude the magazines entirely.
Active Status Under Federal Injunctions / "Freedom Week": Depending on when the magazine was acquired or possessed, defense counsel may assert protections related to historical court stays or injunction periods in ongoing federal constitutional litigation (Duncan v. Bonta).

Hypothetical Examples

Out-of-State Transport: A motorist moves from Nevada to California and packs several 15-round handgun magazines in a locked trunk container. During a routine traffic stop, officers search the vehicle and find the magazines. Outcome: Charged under PC 32310(a) for importing large-capacity magazines into California (a wobbler offense).
Shared Storage Facility: Police execute a search warrant at a rental home shared by three roommates and locate a 30-round rifle magazine inside an unlabelled box in a common hallway closet. Outcome: Defense against PC 32310(c); prosecutors cannot establish constructive possession against a specific roommate without proof of individual ownership or exclusive control.
Compliant Riveted Magazine: A shooter uses a 30-round style rifle magazine at a public firing range that has been permanently blocked with an internal steel limiter and pop-riveted baseplate to hold exactly 10 rounds. Outcome: Dismissal of PC 32310 allegations; the device is permanently altered and meets statutory compliance under PC 16740(c).

Related California Firearms Offenses & Importance of Charge Context

Understanding related offenses is critical because prosecutors frequently file multiple overlapping charges to maximize sentencing exposure and gain leverage during plea negotiations.

Disputing shared legal elements—like knowledge, access, public visibility, or threatening intent—can simultaneously weaken or eliminate several related charges at once. The related crimes include the following:

Penal Code § 30605 PC – Possession of an Assault Weapon: Prohibits possessing firearms defined as "assault weapons" under California law. Because detachable high-capacity magazines often serve as a qualifying feature on semi-automatic centerfire rifles, PC 32310 and PC 30605 are routinely charged together.
Penal Code § 30600 PC – Manufacture/Sale of Assault Weapons: Penalizes manufacturing, distributing, or importing illegal assault weapons into California, carrying severe felony prison terms.
Penal Code § 29800 PC – Felon in Possession of a Firearm: Prohibits individuals with prior felony convictions from owning or possessing firearms. Finding high-capacity magazines often triggers expanded investigations into firearm possession.
Penal Code § 30305 PC – Possession of Ammunition by a Prohibited Person: Restricts individuals prohibited from owning firearms from possessing ammunition or feeding devices.
Penal Code § 25400 PC – Carrying a Concealed Firearm: Prohibits carrying a concealed handgun on your person or inside a vehicle without a valid Concealed Carry Weapon (CCW) permit.
Penal Code § 25850 PC – Carrying a Loaded Firearm in Public: Penalizes carrying a loaded firearm in a public place or inside a vehicle on a public street.

Frequently Asked Questions (FAQs)

What is the legal limit for magazine capacity in California?

California law limits ammunition-feeding devices to a maximum capacity of 10 rounds. Any magazine capable of holding 11 or more rounds is classified as a large-capacity magazine under Penal Code 16740 PC.

Can I legally bring high-capacity magazines I bought in another state into California?

No. Bringing or shipping magazines holding more than 10 rounds into California from another state constitutes unlawful importation under Penal Code 32310(a) PC, which can be charged as a misdemeanor or a felony.

Is simple possession of a large-capacity magazine a felony in California?

No. Under PC 32310(c), simple possession is charged either as a non-criminal infraction (fine up to $100) or as a misdemeanor (up to 1 year in county jail). Felony charges are reserved for manufacturing, selling, or importing under PC 32310(a).

What makes a modified magazine legally compliant in California?

To be legal, a magazine that originally held more than 10 rounds must be permanently modified (e.g., using steel pop-rivets, epoxy resin plugs, or permanent block welds) so it cannot accept more than 10 rounds without destructive machining.

Can charges under PC 32310 be reduced or dismissed?

Yes. Defense attorneys can negotiate with prosecutors to reduce PC 32310 wobblers to infractions, establish lack of possession or knowledge, or file motions to suppress evidence if police conducted an illegal search.

What was "Freedom Week" and does it protect my magazines?

"Freedom Week" refers to a brief period in April 2019 when a federal court injunction temporarily suspended enforcement of PC 32310, allowing Californians to legally purchase high-capacity magazines. While the injunction's status remains subject to ongoing federal appeals (Duncan v. Bonta), proof of purchase during that window can serve as a vital defense element, depending on current court stays.

Can I be charged under PC 32310 if the magazine was empty and not attached to a gun?

Yes. Penal Code 32310 regulates the feeding device itself based on maximum potential capacity. Whether the magazine is loaded, empty, or detached from a firearm does not change its legal classification.

Do I need a defense attorney for a PC 32310 infraction citation?

Yes. Weapons citations under PC 32310 often trigger broader police investigations, potential confiscation of firearms, or additional charges like PC 30605 (assault weapon possession). An attorney ensures minor infractions do not escalate into permanent criminal records.

Call a Criminal Defense Attorney Today

Allegations under California Penal Code 32310 PC carry significant legal risks, particularly when prosecutors combine magazine charges with underlying felony firearm counts. Securing immediate legal counsel is the single most effective step you can take to protect your constitutional rights, your record, and your freedom.

The defense team at Esfandi Law Group brings decades of specialized experience defending clients against California weapons charges.

Call our Los Angeles office today to schedule your free, confidential case evaluation.

Large-Capacity Magazines