California Penal Code 16590 PC: Prohibited Weapons Law Explained

Being arrested or charged under California Penal Code 16590 PC for possessing, manufacturing, importing, or selling a prohibited weapon is a serious criminal matter that can result in county jail or state prison sentences, severe fines, and a permanent criminal record.

California maintains some of the most stringent weapon control statutes in the United States, criminalizing a broad spectrum of dangerous, disguised, or unconventional weapons—many of which people purchase online or for self-defense without knowing they are illegal.

Charges under PC 16590 often arise unexpectedly during routine police traffic stops, airport security screenings, or home searches. Because prosecutors do not need to prove that you intended to use the weapon maliciously, simply owning or carrying a banned item can trigger immediate criminal liability.

If you or a loved one is facing charges under Penal Code 16590, understanding which items are banned, how prosecutors classify these offenses, and what legal defenses are available is vital to protecting your record and future.

What Is the Legal Definition of PC 16590?

California Penal Code 16590 PC serves as California's master statutory index for "generally prohibited weapons." Rather than establishing a single crime, PC 16590 consolidates dozens of specific weapon prohibitions under state law.

Statutory Purpose (PC 16590):

"California Penal Code 16590 lists weapons that are considered generally prohibited under state law, making it illegal to manufacture, import into the state, keep for sale, offer or expose for sale, give, lend, or possess any designated dangerous weapon."

What Specific Weapons Are Prohibited Under Penal Code 16590?

California law categorizes prohibited weapons into several distinct categories, ranging from altered firearms to disguised blades and impact weapons:

1. Disguised or Concealed Knives & Blades

Cane Swords: Blades concealed inside walking canes.
Belt Buckle Knives: Knives hidden within belt buckles.
Air Gauge & Writing Pen Knives: Blades disguised as tire pressure gauges or writing pens.
Ballistic Knives: Knives with detachable blades propelled by a spring or mechanical trigger.
Shurikens: Throwing stars or metal star-shaped martial arts weapons.

2. Modified or Undetectable Firearms

Short-Barreled Shotguns & Rifles: Shotguns with barrels under 18 inches (or overall length under 26 inches) and rifles with barrels under 16 inches (or overall length under 26 inches).
Cane Guns & Wallet Guns: Firearms disguised as walking canes or designed to fire from within a wallet-like enclosure.
Zip Guns & Undetectable Firearms: Improvised firearms or weapons manufactured without sufficient metal content to trigger security screening detectors.
Unconventional Pistols: Handguns that differ from standard firearm designs or fail to meet legal dimensions.
Camouflaging Firearm Containers: Enclosures designed to allow a firearm to be discharged while hidden.

3. Martial Arts & Impact Weapons

Brass Knuckles: Metal or composite devices designed to fit over knuckles to increase punching force.
Nunchakus: Martial arts flails consisting of two sticks joined by a chain or rope (subject to limited martial arts school exceptions).
Leaded Canes & Blackjacks: Weighted blunt weapons or batons.

What Conduct Is Prohibited Under Penal Code 16590 PC?

Under PC 16590, criminal liability extends far beyond physically using or carrying a weapon in public. The law prohibits any of the following commercial or personal actions:

Possession: Having actual physical possession (on your person) or constructive possession (in your car, bedroom, or luggage) of a banned item.
Manufacturing or Assembling: Building, crafting, or modifying a weapon to meet prohibited specifications.
Importation: Bringing a prohibited weapon into California from another state or country (including online orders shipped to a California residence).
Sale or Transfer: Selling, offering for sale, lending, or giving a prohibited weapon to another person.

What Are the Penalties for a PC 16590 Violation?

In California, most offenses listed under Penal Code 16590 PC are wobbler crimes. This means prosecutors can charge the offense as either a misdemeanor or a felony based on the specific weapon involved, the defendant's criminal history, and the facts of the arrest.

Misdemeanor vs. Felony Penalty Comparison Table

Charge Level	Custody / Jail Time	Maximum Fines & Probation Terms
Misdemeanor	Up to 1 year in county jail	Up to $1,000 fine; Summary (informal) probation
Felony	16 months, 2 years, or 3 years in county jail	Up to $10,000 fine; Formal (felony) probation & supervision

Key Factors That Increase Penalty Severity

Prior Weapon Convictions: Previous convictions for violent crimes or weapon violations significantly increase the likelihood of felony filings.
Simultaneous Illegal Activity: Carrying a prohibited weapon while committing another offense (e.g., drug possession, trespass) leads to stacked charges.
Prohibited Locations: Possessing banned weapons near school grounds (under PC 626.9) or government buildings triggers mandatory enhancements.
Immigration Risks: Non-citizens convicted of felony weapon offenses face serious federal immigration consequences, including deportation or inadmissibility.

How Can You Defend Against PC 16590 Prohibited Weapon Charges?

A charge under California Penal Code 16590 PC does not mean you will be convicted. An experienced criminal defense attorney can raise strong legal defenses:

The Item Does Not Meet Statutory Definitions: Law enforcement officers often misidentify legally permitted tools or decorative items as illegal weapons. An attorney can demonstrate that the item fails to meet the exact statutory criteria of a prohibited weapon.
Lack of Knowledge: To convict you of possession, prosecutors must prove you knew the item was present and knew its character as a weapon. If a friend left an item in your vehicle or home without your knowledge, you are not guilty.
Unlawful Search and Seizure (Fourth Amendment Violation): If police discovered the weapon through an illegal traffic stop, an invalid search warrant, or a search without probable cause, your defense attorney can file a Motion to Suppress Evidence under PC 1538.5. If granted, the suppressed evidence cannot be used, often resulting in case dismissal.
Statutory Law Enforcement or Professional Exemption: Certain individuals—including sworn peace officers, military personnel acting in official capacity, forensic experts, and museum curators—are legally exempt from prosecution under specific statutory provisions.

What Related California Weapon Offenses Are Often Charged?

Prosecutors frequently charge PC 16590 alongside or in place of other related California weapon statutes:

California Statute	Offense Name	Key Distinction vs. PC 16590
Penal Code 21310 PC	Carrying a Concealed Dirk or Dagger	Specifically penalizes carrying any fixed-blade or stabbing knife concealed on your person.
Penal Code 22410 PC	Switchblade Knife Violations	Prohibits possessing, carrying, or selling switchblade knives with blades 2 inches or longer.
Penal Code 25400 PC	Carrying a Concealed Firearm	Prohibits carrying a concealed handgun on your person or in a vehicle without a CCW permit.
Penal Code 171b PC	Weapons in Public Buildings	Prohibits bringing any firearm, knife, or prohibited weapon into state or local government buildings.
Penal Code 626.9 PC	Gun-Free School Zone Act	Criminalizes bringing firearms or dangerous weapons onto or near public/private school grounds.

Frequently Asked Questions (FAQs)

Are brass knuckles illegal to own for self-defense in California?

Yes. Possessing brass knuckles—even inside your own home or purchased strictly for self-defense—is illegal under California Penal Code 16590 PC.

Can I be charged under PC 16590 for buying a weapon online from another state?

Yes. Ordering a prohibited weapon online and having it shipped to California constitutes illegal importation under PC 16590, even if the item was legally purchased in another state.

Is a PC 16590 prohibited weapon charge a felony or a misdemeanor?

Most violations under PC 16590 are "wobbler" offenses. Prosecutors decide whether to file misdemeanor charges (up to 1 year in jail) or felony charges (up to 3 years in jail) based on the weapon type and your criminal history.

Are martial arts throwing stars (shurikens) legal in California?

No. Shurikens and metal throwing stars are classified as generally prohibited weapons under PC 16590, making their possession, manufacture, or sale illegal.

What should I do if police find a prohibited weapon during a search?

Exercising your right to remain silent is critical. Do not attempt to explain ownership, claim self-defense, or answer officer questions without a criminal defense attorney present.

Can PC 16590 charges be dropped or dismissed?

Yes. Charges can be dropped or reduced if law enforcement conducted an unlawful search, the item was misidentified, or your attorney proves you did not knowingly possess it.

Learn How We Can Help You

Facing charges under California Penal Code 16590 PC can be intimidating, but you do not have to fight the justice system alone.

At Eisner Gorin LLP, our Los Angeles criminal defense attorneys bring decades of trial experience and deep expertise in California weapon laws to build aggressive, successful defense strategies.

When you retain our firm, our defense team will immediately take action:

Examine the Alleged Weapon: We independently inspect the seized item with expert witnesses to prove it does not meet the legal definition of a prohibited weapon under PC 16590.
Challenge Police Procedure: We review arrest reports, dash-cam footage, and search warrants to identify Fourth Amendment violations and file Motions to Suppress Evidence under PC 1538.5.
Negotiate with Prosecutors: We leverage legal flaws in the state's case to negotiate for charge reductions, misdemeanor conversions, pre-trial diversion, or full dismissals.
Protect Your Record & Immigration Status: We craft defense resolutions specifically designed to prevent felony convictions and protect non-citizens from federal immigration consequences.

Protect your record, your rights, and your future. Contact Eisner Gorin LLP today at (818) 781-1570 or use our online contact form to schedule an immediate consultation with an experienced defense attorney.

Prohibited Weapons