Brass Knuckles Lawyers in San Diego (PC 21810)

Brass knuckles possession under PC 21810 is a wobbler offense carrying up to 3 years. Our San Diego defense lawyers fight to keep this off your record. Call 24/7.

A brass knuckles charge in San Diego changes everything overnight. Most people facing PC 21810 charges never imagined being in this situation. Maybe you bought what you thought was a novelty paperweight at a swap meet. Maybe you inherited a set from a relative who served in the military. Maybe police found them in your car during a traffic stop, and you forgot they were even there. Or maybe they weren’t yours at all.

The circumstances that lead to brass knuckles charges are rarely black and white. This charge doesn’t define who you are.

What happens next depends entirely on the defense you build. PC 21810 is a wobbler, meaning the prosecution can charge it as a misdemeanor or a felony. That distinction affects everything: your criminal record, your ability to own a firearm, your job, your immigration status, and whether you’re looking at probation or years in county jail.

At David P. Shapiro Criminal Defense Attorneys, we’ve defended clients charged with weapons offenses throughout San Diego County, from the Central Courthouse downtown to Chula Vista, El Cajon, and Vista. We know how the San Diego District Attorney’s Office handles these cases, what factors push them toward felony filing, and what it takes to fight for a reduction, a dismissal, or an acquittal.

The bottom line is this: brass knuckles cases are highly defensible, especially when the defense starts early.

Evidence fades. Witnesses forget. The window for the strongest defense is now.

Quick Reference: PC 21810 Brass Knuckles

Classification	Wobbler (misdemeanor or felony)
Misdemeanor Penalty	Up to 1 year county jail
Felony Penalty	16 months, 2, or 3 years county jail (not state prison)
Strike Offense	No
Probation Eligible	Yes (both misdemeanor and felony)
Additional	Felony reducible to misdemeanor under PC 17(b); may qualify for expungement; possible diversion for misdemeanor filing

What Is PC 21810? Understanding the Charge

So what exactly does this statute prohibit? Penal Code Section 21810 makes it illegal to manufacture, import, keep for sale, offer or expose for sale, give, lend, or possess metal knuckles.¹

Now that covers a lot of ground. Let’s break it down.

The statute doesn’t just target people who carry brass knuckles on the street. It criminalizes five distinct types of conduct:

1. Manufacturing (or causing someone else to manufacture them)

2. Importing them into California

3. Keeping them for sale

4. Offering or exposing them for sale

5. Giving, lending, or possessing them

That last category is the one that catches most people. Simple possession, even in your home, is enough for a charge.

What qualifies as “metal knuckles”? Penal Code Section 16920 defines them as any device or instrument made wholly or partially of metal, designed to fit over the knuckles of the hand to protect the fist and increase the force of impact from a punch or blow.² That definition is broader than many people realize. It covers traditional brass knuckles, trench knives with knuckle guards, belt buckle knuckles, and those “paperweight” knuckles sold at flea markets, novelty shops, and online retailers.

Why does this matter for your defense? Because the definition requires the object to be made at least partially of metal and designed for a specific purpose. Objects made entirely of plastic, wood, or carbon fiber may fall outside the statute. And items that weren’t designed to fit over the knuckles, even if they look similar, may not qualify.

What Must the Prosecution Prove?

Here’s what the prosecution is up against. To convict you of possessing brass knuckles under PC 21810, they must prove ALL of the following elements beyond a reasonable doubt:³

1. You possessed metal knuckles (or manufactured, imported, kept for sale, offered for sale, gave, or lent them).

Possession can be either actual or constructive. Actual possession means the knuckles were physically on your person, in your hand, in your pocket. Constructive possession means they were in a location under your control: your car, your apartment, your backpack, your storage unit. The prosecution doesn’t need to prove you were holding them at the moment of arrest.

But here’s the critical distinction: mere proximity is not possession. If brass knuckles were found in a shared vehicle, a common area of an apartment, or someone else’s bag, the prosecution still has to prove you had dominion and control over them. More than one person can possess the same item simultaneously, but the prosecution has to prove that you were one of those people.

2. You knew the metal knuckles were present.

This is the first knowledge element. The prosecution must prove you were aware the brass knuckles existed in the location where they were found. If someone left them in your car without your knowledge, if a roommate stored them in a shared closet, if they were buried in a box of items you received from a relative, the prosecution has a problem.

3. You knew the object was metal knuckles (that is, you knew its character as a prohibited weapon).

This is the second knowledge element, and it’s where many cases fall apart. The prosecution must prove you understood what the object was. This is particularly relevant when the item was marketed or sold as something else: a decorative paperweight, a belt buckle, a bottle opener, a “self-defense tool.” If you genuinely believed the object was a lawful item, the prosecution cannot satisfy this element.

The burden is on them to prove all of this. Beyond a reasonable doubt. That’s the highest standard in our legal system, and every element is a potential avenue for defense.

Wobbler Status: Misdemeanor vs. Felony

PC 21810 is what California law calls a “wobbler,” meaning the prosecutor has discretion to file it as either a misdemeanor or a felony.⁴ For all intents and purposes, this filing decision is one of the most consequential moments in your case.

What Pushes Toward Misdemeanor Filing

The San Diego District Attorney’s Office frequently files PC 21810 as a misdemeanor when:

• You have no prior criminal record
• The brass knuckles were not used in any violent act
• They were found incidentally during a search for something else
• The item appeared decorative or was a novelty purchase
• There’s no connection to gang activity
• No other weapons or drugs were found

What Pushes Toward Felony Filing

Felony filing becomes more likely when:

• You have a criminal history, especially violent priors
• The brass knuckles were used or displayed during a confrontation
• Gang allegations are present
• Other weapons or controlled substances were found simultaneously
• You were engaged in manufacturing or selling brass knuckles
• The case involves additional charges like assault or battery

Why This Matters

An experienced defense attorney can advocate for misdemeanor filing before charges are even formally brought. We can, and will, present mitigating evidence to the DA’s office if the facts support a position to do so. This is one of the most impactful things a defense attorney can do early in a brass knuckles case, because the difference between a misdemeanor and a felony affects everything that follows.

And even if the case is initially filed as a felony, a felony conviction under PC 21810 can later be reduced to a misdemeanor under Penal Code Section 17, subdivision (b), if you were sentenced to probation or county jail.⁵ After reduction, the conviction may be eligible for expungement under Penal Code Section 1203.4.⁶

What Counts as Brass Knuckles?

This is one of the most common questions we hear, and for good reason. Brass knuckles are sold openly across the internet and at swap meets, flea markets, and novelty shops. Many people have no idea they’re illegal in California.

What does that look like in practice? Here are objects that can qualify as “metal knuckles” under PC 16920:⁷

• Traditional brass knuckles with four finger holes and a palm grip
• Trench knives with integrated knuckle guards
• Belt buckle knuckles designed to detach and fit over the hand
• “Paperweight” knuckles sold as decorative items but shaped to fit over the knuckles
• Bottle opener knuckles marketed as novelty bar accessories
• Self-defense keychains made of metal and shaped to fit over the fingers

The key question under the statute is whether the object is made wholly or partially of metal and designed to fit over the knuckles to increase the force of a punch. If the answer to both is yes, it qualifies, regardless of how it was marketed or what the seller called it.

Objects made entirely of non-metal materials (plastic, wood, carbon fiber, resin) may not fall within the statutory definition of “metal knuckles” under PC 16920.⁸ This distinction can be a significant defense in cases where the object’s composition is ambiguous or contested.

Penalties and Consequences

Let’s be real about what you’re facing. The penalties for PC 21810 depend on whether the case is filed as a misdemeanor or a felony.

Sentencing

Filing	Incarceration	Fine	Probation
Misdemeanor	Up to 1 year county jail	Up to $1,000	Eligible
Felony	16 months, 2, or 3 years county jail	Up to $10,000	Eligible

Now here’s something important that almost nobody explains clearly: even a felony conviction under PC 21810 is served in county jail, not state prison.⁹ That’s because PC 21810 falls under Penal Code Section 1170, subdivision (h), which directs certain felony sentences to county jail rather than the state prison system. This is a significant practical distinction. County jail time can often be served through alternative programs like work furlough, electronic monitoring, or weekend reporting. State prison offers none of those options.

Collateral Consequences

The penalties on paper are only part of the picture. A conviction under PC 21810 can ripple through every area of your life.

Firearm Rights. A felony conviction under PC 21810 results in a lifetime prohibition on owning or possessing firearms in California.¹⁰ Even a misdemeanor conviction can trigger a 10-year firearm ban depending on the circumstances. For anyone who owns firearms for hunting, sport shooting, or home protection, this consequence alone can be devastating.

Professional Licenses. A weapons conviction, particularly a felony, can jeopardize professional licenses in fields including law, medicine, nursing, teaching, real estate, financial services, and law enforcement. Licensing boards treat weapons offenses as potential evidence of unfitness, and you may face disciplinary proceedings, denial of renewal, or revocation.

Immigration Consequences. For non-citizens, a weapons conviction can have severe immigration consequences. Depending on the specific facts and filing, a PC 21810 conviction may be classified as a crime involving moral turpitude or an aggravated felony under federal immigration law, triggering deportation proceedings, denial of naturalization, or inadmissibility. If you are not a U.S. citizen, this is something your defense attorney must address from day one.

Employment. Most employers conduct background checks. A felony weapons conviction creates significant barriers to employment, particularly in fields requiring security clearances, government work, positions involving vulnerable populations, or any role where a background check is standard. Even a misdemeanor conviction requires disclosure on many job applications.

Housing. Landlords routinely run criminal background checks. A felony conviction, especially for a weapons offense, can result in denial of rental applications. Public housing and Section 8 programs have their own restrictions on tenants with criminal records.

Voting Rights. A felony conviction in California suspends your right to vote while you are incarcerated in state prison or county jail serving a felony sentence. Your voting rights are restored upon completion of your sentence, but the interruption itself carries weight.¹¹

Defense Strategies for Brass Knuckles Charges

Brass knuckles cases are more defensible than most people realize. The question is identifying the right strategy based on the specific facts and then executing it with precision. Let’s walk through the approaches we consider.

Lack of Knowledge: You Didn’t Know They Were There

The prosecution must prove you knew the brass knuckles were present. What does that mean in practice? If police found them in a borrowed car, in a shared apartment, in a bag someone else left in your vehicle, or in a box of items you received from a relative, the prosecution has to prove you were aware. “They were found in a location associated with the defendant” is not the same as “the defendant knew they were there.”

We investigate the circumstances of discovery, interview witnesses, and build the factual record that challenges the prosecution’s knowledge theory.

The “Novelty Item” Defense: You Didn’t Know It Was a Weapon

Even if you possessed the object, the prosecution must prove you knew its character as a prohibited weapon. This is a real defense with real teeth. Brass knuckles are sold openly online, at flea markets, at novelty shops, and at military surplus stores. They’re marketed as paperweights, belt buckles, bottle openers, and collectibles. Many buyers have no idea they’re purchasing an illegal weapon in California.

If you purchased the item believing it was a lawful decorative or functional object, the prosecution cannot satisfy the knowledge-of-character element. We gather evidence of how the item was marketed, sold, and described to build this defense.

Challenging Possession: Proximity Is Not Enough

Mere proximity to brass knuckles does not establish possession. The prosecution must prove dominion and control. If the knuckles were found in a common area accessible to multiple people, in someone else’s belongings, or in a location where others had equal access, we challenge whether you actually possessed them.

This defense is particularly strong in shared living situations, shared vehicles, and cases where multiple people were present at the time of the search.

Illegal Search and Seizure

This is where many brass knuckles cases live or die. These charges almost always arise from searches during other encounters: traffic stops, DUI checkpoints, pat-downs, probation searches, or searches incident to arrest for unrelated offenses. If law enforcement conducted an unlawful search, lacking probable cause, a valid warrant, or a recognized exception to the warrant requirement, the evidence can be suppressed.¹²

We file motions under Penal Code Section 1538.5 to challenge the legality of the search. Without the physical evidence, the prosecution typically cannot prove its case. In San Diego, where brass knuckles are frequently discovered during vehicle stops and beach patrol encounters, Fourth Amendment challenges are particularly relevant.

Momentary or Transitory Possession

California recognizes a defense of momentary or transitory possession. If you briefly possessed the brass knuckles for the purpose of disposing of them or turning them over to authorities, and your possession was fleeting with no intent to exercise control, this defense may apply.

The Object Doesn’t Meet the Statutory Definition

PC 21810 criminalizes “metal knuckles.” The definition under PC 16920 requires the object to be made wholly or partially of metal and designed to fit over the knuckles.¹³ If the object is made entirely of non-metal materials, or if it wasn’t designed to fit over the knuckles (regardless of its appearance), it may fall outside the statute.

We examine the physical object, its composition, and its design to determine whether it actually meets the legal definition.

Diversion: A Path to Complete Dismissal

For first-time offenders charged with a misdemeanor under PC 21810, misdemeanor diversion under Penal Code Section 1001.95 may be available.¹⁴ Diversion means the case is essentially paused. You complete certain conditions (community service, classes, staying out of trouble), and upon successful completion, the case is dismissed entirely. No conviction. No record.

This isn’t available in every case, and judicial discretion plays a role. But for non-violent, first-time possession cases, it’s a realistic outcome that we pursue aggressively when the facts support it.

Related Charges: Understanding the Differences

Brass knuckles charges rarely exist in isolation. Understanding how PC 21810 interacts with other offenses is critical to building an effective defense.

When Brass Knuckles Are Used in a Violent Act

If brass knuckles were allegedly used to strike or threaten someone, you’re not just facing PC 21810. The prosecution will likely add charges for the underlying violent offense, and the brass knuckles become the “deadly weapon” that elevates those charges:

• Assault with a Deadly Weapon (PC 245(a)(1)) carries 2, 3, or 4 years in state prison as a felony and is a strike offense.¹⁵ This is a far more serious charge than simple possession.
• Battery Causing Serious Bodily Injury (PC 243(d)) applies if the brass knuckles caused significant injury.¹⁶
• Personal Use of a Deadly Weapon Enhancement (PC 12022(b)(1)) adds 1 year consecutive to any felony sentence.¹⁷

The difference between a standalone PC 21810 possession charge and a case involving ADW with a deadly weapon enhancement is enormous. Possession alone is a wobbler with county jail time. ADW is a strike offense with state prison time.

Other Weapons Found During the Same Search

Police who find brass knuckles often find other items during the same search. Related charges may include:

• Carrying a Concealed Dirk or Dagger (PC 21310) if a knife was also found
• Possession of Other Prohibited Weapons (PC 16590 et seq.) for switchblades, billy clubs, or similar items
• Carrying a Concealed Weapon (PC 25400) if a firearm was also discovered

Each additional charge complicates the case, but each charge also requires independent proof of every element. More charges don’t automatically mean a stronger case for the prosecution.

Facing Brass Knuckles Charges in San Diego?

When your case involves a weapons charge that could follow you for years, or one that could potentially be dismissed entirely, the defense strategy matters as much as the facts. Brass knuckles cases turn on search legality, knowledge elements, and filing decisions that require attorneys who handle weapons offenses regularly in San Diego courts. We’ve defended clients caught in vehicle searches, sting operations, and situations where the “weapon” was a paperweight someone bought online without a second thought. We know how to challenge the prosecution’s assumptions and fight for outcomes that keep this off your record.

Your past doesn’t define your future. Your defense does.

Contact our team today for a consultation. We’ll review your case, explain your options, and start building your defense immediately.

References

1. 1. Penal Code, § 21810 [“Any person in this state who manufactures or causes to be manufactured, imports into the state, keeps for sale, or offers or exposes for sale, or who gives, lends, or possesses any metal knuckles is punishable by imprisonment in a county jail not exceeding one year or imprisonment pursuant to subdivision (h) of Section 1170.”]↑ Penal Code, § 21810 [“Any person in this state who manufactures or causes to be manufactured, imports into the state, keeps for sale, or offers or exposes for sale, or who gives, lends, or possesses any metal knuckles is punishable by imprisonment in a county jail not exceeding one year or imprisonment pursuant to subdivision (h) of Section 1170.”]
2. 2. Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]↑ Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]
3. 3. See CALCRIM No. 2502 [Possession of Metal Knuckles].↑ See CALCRIM No. 2502 [Possession of Metal Knuckles].
4. 4. Penal Code, § 21810 [“Any person in this state who manufactures or causes to be manufactured, imports into the state, keeps for sale, or offers or exposes for sale, or who gives, lends, or possesses any metal knuckles is punishable by imprisonment in a county jail not exceeding one year or imprisonment pursuant to subdivision (h) of Section 1170.”]↑ Penal Code, § 21810 [“Any person in this state who manufactures or causes to be manufactured, imports into the state, keeps for sale, or offers or exposes for sale, or who gives, lends, or possesses any metal knuckles is punishable by imprisonment in a county jail not exceeding one year or imprisonment pursuant to subdivision (h) of Section 1170.”]
5. 5. Penal Code, § 17, subd. (b).↑ Penal Code, § 17, subd. (b).
6. 6. Penal Code, § 1203.4.↑ Penal Code, § 1203.4.
7. 7. Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]↑ Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]
8. 8. Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]↑ Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]
9. 9. Penal Code, § 1170, subd. (h).↑ Penal Code, § 1170, subd. (h).
10. 10. Penal Code, § 29800.↑ Penal Code, § 29800.
11. 11. See Cal. Const., art. II, § 4.↑ See Cal. Const., art. II, § 4.
12. 12. Penal Code, § 1538.5.↑ Penal Code, § 1538.5.
13. 13. Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]↑ Penal Code, § 16920 [“‘Metal knuckles’ means any device or instrument made wholly or partially of metal, the purpose of which is to fit over the knuckles of the hand of the user to protect the fist and increase the force of impact from a punch or blow.”]
14. 14. Penal Code, § 1001.95.↑ Penal Code, § 1001.95.
15. 15. Penal Code, § 245, subd. (a)(1).↑ Penal Code, § 245, subd. (a)(1).
16. 16. Penal Code, § 243, subd. (d).↑ Penal Code, § 243, subd. (d).
17. 17. Penal Code, § 12022, subd. (b)(1).↑ Penal Code, § 12022, subd. (b)(1).