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Penal Code 18720 PC – Destructive Device Materials

Posted by Sam Israels | May 21, 2026

California Penal Code 18720 PC makes it illegal to possess materials or substances with the intent to manufacture destructive devices or explosives.

California prosecutors aggressively pursue destructive device allegations because these cases often involve public safety concerns, potential injuries, and serious criminal exposure.

A conviction under California Penal Code 18720 PC may result in felony penalties, prison exposure, immigration consequences, firearm restrictions, and permanent criminal records.

Even possessing ordinary materials may lead to criminal charges if prosecutors believe the items were intended for use in constructing explosive devices.

Los Angeles criminal defense attorneys at Cron, Israels & Stark are here to help. Schedule a consultation via contact form or call (424) 372-3112.  

This guide explains California Penal Code 18720 PC, criminal penalties, legal defenses, examples, related California laws, and frequently asked questions.


What Is California Penal Code 18720 PC?

California Penal Code 18720 PC prohibits possessing substances, materials, or combinations of components with the intent to make destructive devices or explosives.

The statute focuses heavily on intent. Prosecutors generally must show that the defendant possessed materials with the intent to manufacture or assemble destructive devices.

The law applies to both completed and partially assembled explosive materials.


Text of California Penal Code 18720 PC

California Penal Code 18720 PC states, in substance, that any person who possesses ingredients or components commonly used to make destructive devices, with the intent to manufacture a destructive device or an explosive, may be guilty of a felony.

The statute does not require prosecutors to prove the destructive device was fully assembled.


What Are Destructive Device Materials?

Destructive device materials may include:

  • Explosive chemicals
  • Pipe bomb components
  • Fuses
  • Detonators
  • Incendiary materials
  • Explosive powders
  • Bomb-making substances
  • Homemade explosive ingredients
  • Metal pipes or containers intended for explosive use

Many ordinary household or industrial items may become illegal when prosecutors believe they were possessed for unlawful explosive purposes.


Examples of Destructive Device Material Cases

Understanding how these allegations arise may help explain California's explosive device laws.

Example 1: Pipe Bomb Components

Police allegedly discovered pipes, explosive powder, and detonator materials during a residential search.


Example 2: Homemade Explosive Investigation

Investigators claim a suspect possessed chemicals and instructions for constructing explosive devices.


Example 3: Vehicle Search Discovery

Law enforcement officers allegedly recovered bomb-making materials during a traffic stop investigation.


Example 4: Storage Unit Investigation

Authorities claim destructive device components were stored inside a rented storage unit.


Elements Prosecutors Must Prove

To convict someone under California Penal Code 18720 PC, prosecutors generally must prove:

  1. The defendant possessed substances or materials commonly used to create destructive devices
  2. The defendant intended to manufacture a destructive device or explosive
  3. The defendant knowingly possessed the materials

Intent is often one of the most heavily disputed issues in these cases.


Penalties for Violating California Penal Code 18720 PC

California Penal Code 18720 PC is generally charged as a felony offense.

Potential penalties may include:

  • State prison sentences
  • Felony probation
  • Significant fines
  • Firearm prohibitions
  • Immigration consequences
  • Permanent criminal records

The severity of penalties may increase if allegations involve:

  • Intent to injure others
  • Gang activity
  • Prior felony convictions
  • Possession near schools
  • Alleged terrorism-related conduct

Federal Criminal Charges for Explosive Materials

Some investigations into destructive devices may trigger federal prosecution.

Federal authorities may become involved when allegations include:

  • Interstate transportation of explosives
  • Terrorism investigations
  • Explosive trafficking
  • Organized criminal enterprises
  • Military-grade explosive materials

Federal convictions often carry lengthy prison sentences and enhanced penalties.


Related California Explosive and Weapon Laws

California has multiple statutes regulating destructive devices, explosives, and prohibited weapons.


Penal Code 16460 PC – Definition of Destructive Device

California Penal Code 16460 PC defines destructive devices under California law.

The statute includes:

  • Bombs
  • Grenades
  • Explosive missiles
  • Incendiary devices
  • Molotov cocktails

This definition often serves as the basis for criminal charges related to explosives.


Penal Code 18710 PC – Possession of Destructive Devices

California Penal Code 18710 PC prohibits possessing completed destructive devices or explosives.

Individuals may face charges under both Penal Code 18710 PC and Penal Code 18720 PC in the same case.


Penal Code 18715 PC – Possession of Explosives or Destructive Devices

California Penal Code 18715 PC criminalizes possessing destructive devices or explosives under specified circumstances.

These charges may overlap with allegations involving bomb-making materials.


Penal Code 18725 PC – Possession With Intent to Injure or Destroy Property

California Penal Code 18725 PC prohibits possessing destructive devices or explosive materials with the intent to injure others or destroy property.

This offense may carry enhanced sentencing exposure.


Penal Code 12303.2 PC – Explosives Near Schools

California law imposes additional penalties when explosive materials are allegedly possessed near schools or educational facilities.


Immigration Consequences of Explosive Device Convictions

Convictions involving destructive devices or explosive materials may create severe immigration consequences for non-citizens.

Potential immigration consequences may include:

  • Deportation proceedings
  • Visa denial
  • Inadmissibility
  • Denial of naturalization

Non-citizens facing explosive-related allegations should seek immediate legal representation.


Common Defenses to Destructive Device Material Charges

A criminal defense lawyer may challenge explosive material allegations using several legal defenses.


Lack of Intent

The defense may argue that the defendant possessed ordinary materials without intent to create destructive devices.


The Materials Were Lawfully Possessed

Some materials may have legitimate industrial, commercial, recreational, or household uses.


Illegal Search and Seizure

Evidence obtained through unconstitutional searches may be excluded from court proceedings.


Lack of Knowledge

The defense may argue the defendant did not know the materials were present.


False Allegations

Witnesses or investigators may provide inaccurate information regarding ownership or intent.


Firearm Restrictions Following a Conviction

Felony convictions involving destructive devices or explosive materials may lead to:

  • Lifetime firearm prohibitions
  • Loss of ammunition rights
  • Federal firearm restrictions
  • Enhanced penalties for future weapon offenses

Weapon-related convictions may create long-term legal consequences.


Expungement and Post-Conviction Relief

Some defendants may qualify for post-conviction relief depending on the outcome of the case and sentencing terms.

Potential relief may include:

  • Expungement
  • Felony reduction in qualifying cases
  • Early probation termination
  • Record sealing where permitted

Eligibility depends on the conviction, criminal history, and sentence imposed.


Why Early Legal Representation Matters

Explosive material investigations often involve forensic testing, search warrants, constitutional issues, and expert testimony.

A criminal defense lawyer may help by:

  • Challenging unlawful police searches
  • Investigating forensic evidence
  • Contesting intent allegations
  • Consulting explosive experts
  • Negotiating reduced charges
  • Preparing a defense for trial

Early legal intervention may improve opportunities to reduce charges or avoid conviction.


Frequently Asked Questions

What is California Penal Code 18720 PC?

The law prohibits possessing materials or substances with intent to manufacture destructive devices or explosives.

Can ordinary materials lead to criminal charges?

Yes. Prosecutors may file charges if they believe ordinary materials were intended for use in making explosive devices.

Is Penal Code 18720 PC a felony?

Yes. Violations are generally charged as felony offenses.

Do prosecutors need to prove intent?

Yes. Intent to manufacture destructive devices is a key element of the offense.

Can federal charges apply?

Yes. Some cases involving explosive materials may result in federal criminal prosecution.

Can a conviction affect immigration status?

Yes. Explosive-related convictions may lead to deportation or inadmissibility.


Speak With a California Criminal Defense Lawyer

If you were arrested or investigated for allegations involving destructive device materials in California, obtaining legal representation promptly is essential.

Explosive-related convictions may carry severe consequences, including felony convictions, prison exposure, firearm restrictions, immigration consequences, and permanent criminal records.

An experienced California criminal defense lawyer can evaluate your case, explain your legal rights, challenge unlawful searches, contest intent allegations, and develop a strategic defense tailored to your situation.

Early legal intervention can enhance your chances of suppressing evidence, lowering charges, or seeking dismissal. Cron, Israels & Stark are ready to assist you. Book your consultation now.

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About the Author

Sam Israels
Sam Israels

Sam J. Israels is a Law Firm partner with the Law Offices of Cron, Israels, & Stark. Mr. Israels received his J.D. degree from the Santa Clara University School of Law. Mr. Israels also previously worked at the Los Angeles Office of the City Attorney. He is admitted to practice law in the State o...

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