Dirk or Dagger Lawyers in San Diego (PC 21310)

Carrying a concealed dirk or dagger under PC 21310 is a wobbler offense. Misdemeanor or felony, your defense starts now. Our San Diego defense lawyers fight to keep this off your record. Call 24/7.

A concealed weapon charge in San Diego changes everything overnight. One moment you’re going about your day. The next, you’re in handcuffs because police found a knife on your person during a stop, a search, or a checkpoint you didn’t see coming.

The circumstances that lead to PC 21310 charges are rarely black and white. A construction worker heading home with a utility knife still clipped to his belt. A chef who forgot a blade in a jacket pocket after a shift. A camper driving back from the mountains who gets pulled over for a broken taillight. Someone carrying a folding knife that an officer claims was in the locked-open position. These aren’t hardened criminals. These are everyday people caught in situations that escalated into criminal charges.

Charges are accusations, not convictions. The prosecution still has to prove every element beyond a reasonable doubt, and concealed weapon cases often have significant weaknesses, particularly when it comes to how the weapon was discovered in the first place.

The fear and uncertainty of facing a weapons charge are completely understandable. What matters now is the defense you build. 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 these cases work in San Diego courts, we know what the prosecution has to prove, and we know where their cases fall apart.

Time matters. Early action creates options that disappear later. The difference between a felony conviction and a misdemeanor resolution, or even a dismissal, often comes down to what happens in the first few weeks after charges are filed.

Quick Reference: PC 21310 Carrying a Concealed Dirk or Dagger

Classification	Wobbler (misdemeanor or felony)
Misdemeanor Penalty	Up to 1 year county jail
Felony Penalty	16 months, 2, or 3 years county jail (under PC 1170(h))
Strike Offense	No
Probation Eligible	Yes (both misdemeanor and felony)
Key Exemption	Knife in sheath worn openly on waist is NOT concealed
Additional	Felony reducible to misdemeanor under PC 17(b)

What Is a “Dirk or Dagger” Under California Law?

So what exactly qualifies as a dirk or dagger? Well, Penal Code Section 16470 defines it as “a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”¹

Now that’s a broad definition, and that’s intentional. Let’s break down what it actually covers, because this is where many people are surprised.

A dirk or dagger is not limited to what you might picture: some medieval-looking blade with a cross guard. Under California law, the definition extends to any instrument capable of ready use as a stabbing weapon. That includes fixed-blade knives of virtually any size, locking folding knives when in the locked-open position, ice picks, sharpened screwdrivers, letter openers ground to a point, and even modified tools. If it can stab and it can cause great bodily injury or death, it can be classified as a dirk or dagger.²

Here’s the critical distinction, though. The statute explicitly excludes two categories:

Non-locking folding knives are not dirks or daggers, regardless of blade length.³

Folding knives not in the locked-open position are not dirks or daggers.⁴

Why does this matter for your defense? Because the classification of the object is an element the prosecution must prove. If the knife in question was a folding knife and the prosecution cannot establish it was locked open at the time of discovery, the charge fails. That factual question, whether the blade was locked open, often comes down to the officer’s testimony versus the defendant’s account. It is one of the most contested issues in these cases.

What Must the Prosecution Prove?

Here’s what the prosecution is up against. To convict you of carrying a concealed dirk or dagger under PC 21310, they must prove ALL of the following elements beyond a reasonable doubt:⁵

1. You carried a dirk or dagger on your person.

The weapon must have been physically on your body or in clothing you were wearing. This can include items in a jacket pocket, pants pocket, waistband, or a bag being carried on your person. The prosecution has to establish that the item meets the statutory definition of a dirk or dagger, meaning it was capable of ready use as a stabbing weapon that could inflict great bodily injury or death.

2. The dirk or dagger was concealed.

The weapon must have been hidden from ordinary observation. This is a straightforward but important element. Under Penal Code Section 16470, a knife carried in a sheath worn openly suspended from the waist is explicitly not concealed.⁶ If the knife was visible, clipped to the outside of a pocket, or otherwise in plain view, the concealment element fails.

3. You knew you were carrying it.

The prosecution must prove you were aware the item was on your person. This isn’t always as obvious as it sounds. If you borrowed someone’s jacket and didn’t know a knife was in the pocket, or if you grabbed a bag that contained a blade you didn’t put there, the knowledge element is genuinely at issue.

4. You knew it could readily be used as a stabbing weapon capable of inflicting great bodily injury or death.

This is a separate and distinct knowledge requirement. The prosecution must prove not only that you knew you were carrying the item, but that you knew the item could function as a stabbing weapon. For a large fixed-blade hunting knife, this element is hard to contest. For a multi-tool with a locking blade, or a work implement that doubles as a potential weapon, the analysis becomes more nuanced.

Every element is a question mark for the prosecution and an opportunity for the defense. If the prosecution cannot prove any one of these elements beyond a reasonable doubt, you cannot be convicted of carrying a concealed dirk or dagger.

The Wobbler: Why Classification Matters

PC 21310 is a wobbler offense, meaning the San Diego District Attorney has discretion to file it as either a misdemeanor or a felony.⁷ The difference between those two outcomes is enormous, and understanding what drives the filing decision is critical.

When the DA Typically Files as a Misdemeanor

For first-time offenders with no aggravating circumstances, the San Diego DA’s office tends to file PC 21310 as a misdemeanor. Factors that favor misdemeanor treatment include no prior criminal history, no other charges filed alongside the weapons charge, the weapon being a common knife rather than a combat-style blade, no evidence of intent to use the knife as a weapon, and cooperation with law enforcement.

When the DA Typically Files as a Felony

Felony filing becomes more likely when the defendant has prior criminal history (especially weapons or violent offenses), the knife was discovered during the commission of another crime, gang allegations are present, or the weapon itself is particularly dangerous, such as a large fixed-blade combat knife versus a standard pocket knife.

Reduction Under PC 17(b)

Even if the case is filed as a felony, or even if you’re convicted of a felony, the charge can potentially be reduced to a misdemeanor under Penal Code Section 17, subdivision (b).⁸ This is a significant strategic consideration. A skilled defense attorney can petition the court for reduction at sentencing, at the completion of probation, or in some cases during the proceedings. Factors the court considers include the nature and circumstances of the offense, the defendant’s character and criminal history, and whether the interests of justice would be served by reduction.

For all intents and purposes, the wobbler classification means that aggressive defense advocacy can make the difference between a felony weapons conviction that follows you for life and a misdemeanor that may eventually be expunged.

Felony Sentencing Under Realignment

One important point that many people, and even some attorneys, get wrong: a felony conviction under PC 21310 does not result in a state prison sentence. Under California’s realignment law, Penal Code Section 1170, subdivision (h), felony sentences for PC 21310 are served in county jail.⁹ This is because PC 21310 is not classified as a serious felony, violent felony, or sex offense requiring registration.

The felony sentencing triad is 16 months, 2 years, or 3 years in county jail. While county jail is still incarceration, the distinction from state prison matters for purposes of custody credits, facility conditions, and the overall trajectory of the case.

Collateral Consequences of a Conviction

Firearm Rights

A felony conviction under PC 21310 results in a lifetime prohibition on owning or possessing firearms under both California and federal law.¹⁰ This prohibition is codified under PC 29800, the felon with a firearm statute, meaning any subsequent firearm possession becomes a separate felony. Even a misdemeanor conviction may trigger firearm restrictions depending on the specific circumstances and federal interpretation. If you own firearms or need them for your profession, this consequence alone makes aggressive defense essential.

Professional Licenses

A weapons conviction, particularly a felony, can trigger disciplinary proceedings for professionals licensed by the state. Doctors, nurses, attorneys, teachers, real estate agents, contractors, and other licensed professionals may face license suspension or revocation. The California Business and Professions Code requires many licensing boards to consider criminal convictions as grounds for discipline, especially convictions involving weapons or moral turpitude.

Immigration Consequences

For non-citizens, a felony weapons conviction can trigger deportation proceedings or render you inadmissible for future immigration benefits. Weapons offenses are treated seriously under federal immigration law, and even a misdemeanor conviction can complicate naturalization applications, visa renewals, and green card petitions. If you are not a U.S. citizen, discuss immigration consequences with your defense attorney before accepting any plea.

Employment and Housing

A felony conviction appears on background checks and can disqualify you from employment in many industries. Government positions, security-related jobs, positions involving vulnerable populations, and roles requiring security clearances are particularly affected. Housing applications increasingly include criminal background checks, and a felony weapons conviction can result in denial of rental applications.

Firearm Enhancement on Co-Charged Offenses

When PC 21310 is charged alongside another offense, the dirk or dagger itself can become the basis for a weapon enhancement on the co-charged crime. For example, if you’re also charged with assault, the presence of the concealed weapon could trigger additional sentencing enhancements under Penal Code Section 12022, subdivision (b)(1), adding one year consecutive to the sentence on the other offense.¹¹

Defense Strategies for Concealed Dirk or Dagger Charges

Now let’s talk about how these cases are actually defended. The reality of the situation is that PC 21310 cases often have significant vulnerabilities the prosecution would rather you not explore. Many lawyers, based on inexperience, will just try to negotiate a plea without investigating the case. The right approach is different.

The Search Is the Weakest Link: Fourth Amendment Challenges

This is arguably the most important defense in any concealed weapon case, and here’s why. By definition, the weapon is concealed. That means law enforcement couldn’t see it. So how did they find it? They searched you. And that search must be lawful under the Fourth Amendment.¹²

A successful motion to suppress evidence under Penal Code Section 1538.5 can eliminate the physical evidence, which is typically the prosecution’s entire case.¹³ We can, and will, challenge the legality of the search if the facts support a position to do so. Common suppression arguments include:

No reasonable suspicion for the initial stop. Police cannot stop you without articulable facts suggesting criminal activity. If the stop itself was unlawful, everything that flows from it, including the discovery of the weapon, is suppressed.

Pat-down exceeded lawful scope. During a Terry stop, officers may conduct a limited pat-down of outer clothing for weapons. But they cannot reach into pockets unless they feel an object that is immediately identifiable as a weapon through the clothing. If the officer went into your pockets without that justification, the search was unlawful.

No probable cause for arrest. If the weapon was discovered during a search incident to arrest, the arrest itself must have been supported by probable cause. No valid arrest means no valid search.

Coerced consent. If police asked for consent to search and you agreed, the question becomes whether that consent was truly voluntary. Consent obtained through intimidation, implied threats, or deception may be invalid.

In San Diego, many PC 21310 charges arise from DUI checkpoints, traffic stops, and encounters in the Gaslamp Quarter or beach communities. In each of these contexts, the legality of the initial contact and subsequent search is the first question we ask.

Not a Dirk or Dagger: Challenging the Object Definition

The prosecution must prove the object meets the statutory definition. If the item was a non-locking folding knife, or a folding knife that was not in the locked-open position at the time of discovery, it is not a dirk or dagger under California law.¹⁴

What does that look like in practice? It often comes down to the officer’s testimony about the blade position at the time of the encounter. We challenge that testimony by examining whether the officer documented the blade position in their report, whether body camera footage shows the knife’s condition, and whether the knife could have shifted from an unlocked to locked position during handling.

Lack of Knowledge

CALCRIM 2501 requires the prosecution to prove two separate knowledge elements: that you knew you were carrying the item, and that you knew it could be used as a stabbing weapon.¹⁵ There are real-world scenarios where one or both of these elements are genuinely at issue.

Imagine a situation where you borrowed a friend’s jacket and didn’t know a knife was in the inside pocket. Or you picked up a bag at work that someone else had placed a blade in. Or you were carrying a multi-tool and didn’t realize the blade component had shifted into the locked position. These aren’t hypothetical defenses. They’re scenarios we’ve seen.

Open Carry Defense

If the knife was carried openly rather than concealed, PC 21310 does not apply. The statute specifically exempts a knife carried in a sheath worn openly suspended from the waist.¹⁶ If the knife was visible, whether clipped to the outside of a pocket, in a belt sheath, or otherwise in plain view, the concealment element fails entirely. This is a bright-line statutory exemption that can result in outright dismissal.

Challenging “Ready Use”

The prosecution must prove the item was capable of “ready use” as a stabbing weapon.¹⁷ If the knife was deeply buried in a backpack, wrapped in protective packaging, stored in a toolbox, or otherwise not in a condition for immediate deployment, the “ready use” element can be challenged. The argument is straightforward: an item that requires multiple steps to access and deploy is not in a state of “ready use.”

Wobbler Reduction and Mitigation

Even when the elements are provable, aggressive advocacy for misdemeanor treatment is critical. We build mitigation packages that include employment verification, character references, community ties, and evidence demonstrating the knife was carried for a legitimate purpose. For first-time offenders in San Diego, misdemeanor treatment and even diversion may be achievable with the right presentation to the court and the prosecution.

Related Charges: Understanding the Differences

PC 21310 is one of several weapons offenses under California law, and understanding how it relates to other charges helps clarify what you’re actually facing.

Assault with a Deadly Weapon (PC 245(a)(1)) is a far more serious charge that applies when a weapon, including a knife, is used to threaten or assault someone.¹⁸ ADW is a wobbler and a strike offense if convicted as a felony. If you’re charged with both PC 21310 and ADW, the assault charge carries significantly greater consequences.

Carrying a Switchblade (PC 21510) is a misdemeanor that applies specifically to switchblade knives with blades two or more inches long.¹⁹ If the knife at issue is a switchblade rather than a dirk or dagger, the charge and potential penalties differ.

Brandishing a Weapon (PC 417) applies when a weapon is drawn or exhibited in a threatening manner.²⁰ This is a separate offense from concealed carry and is typically charged when the knife was displayed rather than hidden.

Possession of a Weapon on School Grounds (PC 626.10) is a separate, potentially felony offense that applies when a knife is brought onto school property.²¹ If the concealed weapon was discovered on or near a school campus, this additional charge may apply.

The bottom line is that PC 21310 standing alone, without aggravating circumstances or co-charged offenses, is among the more defensible weapons charges in California. The wobbler classification, the specific statutory exemptions, and the frequent search-and-seizure issues all create real opportunities for defense.

Facing Concealed Weapon Charges in San Diego?

Concealed weapon cases live and die on the details: how the knife was discovered, what position the blade was in, whether the search was lawful, and whether the prosecution can actually prove you knew what you were carrying. We’ve defended clients charged with PC 21310 across San Diego County, from cases arising out of traffic stops and DUI checkpoints to Gaslamp Quarter encounters and probation searches. We know how San Diego prosecutors approach these cases, and we know where their cases break down. We are attorneys who will actually take cases to a jury if that’s what it takes.

Every day without representation is a day the prosecution works unopposed. The sooner we start, the more options you have.

Call us 24/7 for a consultation. We’ll review the facts of your case, explain exactly what you’re facing, and start building your defense immediately. The bottom line is this: you’re entitled to a defense that matches the seriousness of what you’re up against. Protect your freedom, protect your future.

References

1. 1. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
2. 2. Penal Code, § 21310.↑ Penal Code, § 21310.
3. 3. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
4. 4. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
5. 5. See CALCRIM No. 2501 [Carrying Concealed Dirk or Dagger].↑ See CALCRIM No. 2501 [Carrying Concealed Dirk or Dagger].
6. 6. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
7. 7. See Penal Code, § 21310; Penal Code, § 17, subd. (a).↑ See Penal Code, § 21310; Penal Code, § 17, subd. (a).
8. 8. Penal Code, § 17, subd. (b).↑ Penal Code, § 17, subd. (b).
9. 9. Penal Code, § 1170, subd. (h).↑ Penal Code, § 1170, subd. (h).
10. 10. Penal Code, § 29800; see also 18 U.S.C. § 922(g).↑ Penal Code, § 29800; see also 18 U.S.C. § 922(g).
11. 11. Penal Code, § 12022, subd. (b)(1).↑ Penal Code, § 12022, subd. (b)(1).
12. 12. Penal Code, § 1538.5.↑ Penal Code, § 1538.5.
13. 13. Penal Code, § 1538.5.↑ Penal Code, § 1538.5.
14. 14. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
15. 15. See CALCRIM No. 2501 [Carrying Concealed Dirk or Dagger].↑ See CALCRIM No. 2501 [Carrying Concealed Dirk or Dagger].
16. 16. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
17. 17. Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]↑ Penal Code, § 16470 [“As used in this part, ‘dirk’ or ‘dagger’ means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.”]
18. 18. Penal Code, § 245, subd. (a)(1).↑ Penal Code, § 245, subd. (a)(1).
19. 19. Penal Code, § 21510.↑ Penal Code, § 21510.
20. 20. Penal Code, § 417.↑ Penal Code, § 417.
21. 21. Penal Code, § 626.10.↑ Penal Code, § 626.10.