Facing a federal gun charge can be frightening and stressful, especially if you don’t understand why your case is being prosecuted in federal court instead of California state court. Federal firearm offenses often involve different laws, agencies, and penalties than state gun crimes, making these cases more complex than many people realize. If you are under federal investigation or have been arrested on a federal firearm charge, speaking with an experienced San Diego federal criminal defense attorney as early as possible can help you understand your rights and legal options. Contact Sevens Legal Criminal Lawyers today at (858) 777-7777 for a free legal consultation.
Quick Answer
Federal gun charges are firearm offenses prosecuted under federal law, often involving prohibited possession, firearm trafficking, false statements during firearm purchases, interstate transfers, machine guns, suppressors, or altered serial numbers. These cases are commonly investigated by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and prosecuted by federal prosecutors in U.S. District Court.
Key Takeaways
• Federal gun charges involve violations of federal firearms laws and are prosecuted in U.S. District Court.
• The ATF is the primary agency responsible for investigating federal firearm offenses.
• Common federal firearm crimes include felon in possession, firearm trafficking, straw purchases, illegal interstate transfers, machine guns, suppressors, and firearms with obliterated serial numbers.
• Some firearm offenses may violate both California and federal law.
• Early legal representation can be critical if you are under federal investigation or have been charged with a firearm offense.
Federal Firearm Laws
Federal firearm offenses are primarily governed by the Gun Control Act of 1968 and the National Firearms Act (NFA), along with related provisions found in 18 U.S.C. Chapter 44. These laws regulate who may possess firearms, how firearms may be transferred, and what types of weapons require additional registration or restrictions. Federal firearm investigations are typically led by the ATF, often in coordination with the FBI, DEA, Homeland Security Investigations, or local law enforcement through joint task forces.
Common Federal Firearm Crimes at a Glance
| Federal Firearm Crime | Common Federal Statute |
|---|---|
| Felon in Possession of a Firearm | 18 U.S.C. § 922(g) |
| Straw Purchase of a Firearm | 18 U.S.C. §§ 922(a)(6), 924 |
| Illegal Interstate Firearm Transfers | 18 U.S.C. § 922(a) |
| Possession of a Machine Gun | 18 U.S.C. § 922(o); National Firearms Act |
| Possession of an Unregistered Suppressor | National Firearms Act |
| Firearm With an Obliterated Serial Number | 18 U.S.C. § 922(k) |
What Makes a Gun Crime a Federal Offense?
A firearm offense becomes federal when the alleged conduct violates a federal firearm statute or otherwise falls within federal jurisdiction. This may involve interstate activity, prohibited firearms, firearm trafficking, false statements during a firearm purchase, or other conduct regulated by federal law.
For example, transporting firearms across state lines without complying with federal law, making false statements during a firearm purchase, or possessing certain prohibited firearms may trigger a federal investigation. Cases involving multiple states, organized trafficking, or federal agencies are also more likely to be prosecuted federally.
Many gun crimes are still handled under California law by local prosecutors, and some conduct may violate both state and federal law. Understanding whether your case falls under state or federal jurisdiction can significantly affect the investigation, court process, and potential penalties. If you’re unsure how federal cases differ from California prosecutions, our article explaining the difference between state and federal charges provides a more detailed comparison.
Common Federal Firearm Crimes
Federal firearm laws cover a wide range of offenses beyond simply possessing a gun. While each case depends on its specific facts, the following are among the most common firearm crimes prosecuted in federal court.
Felon in Possession of a Firearm
One of the most frequently prosecuted federal firearm offenses involves individuals who are prohibited from possessing firearms because of certain prior convictions or legal restrictions. Under 18 U.S.C. § 922(g), several categories of people—including many convicted felons—may be prohibited from possessing firearms or ammunition.
According to U.S. Sentencing Commission statistics, 7,245 offenders were sentenced under 18 U.S.C. § 922(g) in fiscal year 2025, and of those 7,245 offenders, 89% were convicted because of a prior felony conviction. Furthermore, 98% of those section 922(g) individuals were sentenced to prison, with the imposed sentences varying widely depending on whether a mandatory minimum penalty applied in the case.
It is important to note that prosecutors do not always need to prove that a firearm was used during another crime. Simply possessing a firearm while legally prohibited may be enough to support federal charges. In some cases, prosecutors may argue that a person had constructive possession, meaning they exercised control over a firearm even if it was not physically on their person.
Firearm Trafficking
Federal firearm trafficking generally involves unlawfully transferring, transporting, or receiving firearms under circumstances prohibited by federal law. Under 18 U.S.C. § 933, federal law specifically prohibits certain firearm transfers and receipts when a person knows or has reasonable cause to believe the firearm will be used, carried, possessed, or received in connection with a felony.
Firearm trafficking investigations may involve multiple firearms, repeated transactions, interstate activity, or suspected distribution networks. ATF agents may use surveillance, confidential informants, undercover operations, firearm tracing, and financial records to investigate suspected trafficking.
Trafficking charges may also be accompanied by conspiracy charges, drug offenses, or other federal crimes depending on the circumstances.
Straw Purchases
A straw purchase occurs when someone buys a firearm on behalf of another person while falsely representing themselves as the actual purchaser during the transaction. These cases commonly involve alleged false statements made during the federal background check process or on ATF Form 4473.
Not every purchase for another person is illegal, but intentionally buying a firearm for someone who is prohibited from possessing one—or providing false information during the purchase process—may result in serious federal charges.
Illegal Interstate Firearm Transfers
Federal law places significant restrictions on transferring firearms across state lines. In many situations, interstate firearm transfers must be completed through a federally licensed firearms dealer (FFL) to comply with federal law.
Violations may arise when firearms are transported or transferred without following federal requirements, particularly when multiple states or jurisdictions are involved. Because interstate commerce is a central basis for federal jurisdiction, these cases are frequently prosecuted in federal court rather than state court.
Machine Guns and Conversion Devices
Federal law strictly regulates machine guns and certain firearm conversion devices under the National Firearms Act (NFA) and the Gun Control Act. In general, machine guns manufactured after May 19, 1986, cannot be lawfully possessed by private citizens except in very limited circumstances.
Federal prosecutors have also increased enforcement involving conversion devices, commonly known as Glock switches or auto sears. These small devices can convert certain semi-automatic pistols into fully automatic weapons and are generally classified as machine guns under federal law, even when they are not installed on a firearm.
Simply possessing an unregistered machine gun or an illegal conversion device can result in serious federal criminal charges, regardless of whether the firearm was ever fired.
Suppressors (Silencers)
Contrary to popular belief, suppressors—often called silencers—are not automatically illegal under federal law. However, they are heavily regulated under the National Firearms Act.
To lawfully possess a suppressor under federal law, an individual generally must comply with federal registration requirements and obtain ATF approval before taking possession. Possessing an unregistered suppressor or transferring one without following federal law may lead to federal criminal charges.
Firearms With Obliterated Serial Numbers
Federal law generally prohibits knowingly possessing or transferring a firearm with a removed, altered, or obliterated serial number.
Serial numbers allow law enforcement to identify and trace firearms. When a serial number has been intentionally altered or removed, prosecutors may argue that the firearm was intended to conceal its origin or ownership.
What Are the Penalties for Federal Gun Charges?
Penalties for federal gun charges vary depending on the offense, criminal history, type of firearm involved, and circumstances of the case. Depending on the charge, a conviction can result in years in federal prison, substantial fines, and the loss of firearm rights. Federal courts also consider the U.S. Sentencing Guidelines when determining a sentence.
For example, a conviction under 18 U.S.C. § 922(g) for possessing a firearm as a prohibited person can carry up to 15 years in federal prison. Certain defendants with qualifying prior convictions may face a 15-year mandatory minimum under the Armed Career Criminal Act.
Other federal firearm offenses can carry different penalties, and additional mandatory minimums may apply when a firearm is used, carried, or possessed in connection with certain federal crimes.
How Do Federal Firearm Investigations Begin?
Many federal firearm cases begin long before an arrest is made. Rather than responding to a single incident, federal investigators often spend months gathering evidence before charges are filed. Depending on the allegations, investigations may involve:
• ATF agents
• FBI agents
• Homeland Security Investigations (HSI)
• Drug Enforcement Administration (DEA)
• Local law enforcement working with federal task forces
Investigators may use surveillance, confidential informants, search warrants, financial records, digital evidence, controlled purchases, or undercover operations to build a case for federal firearm charges.
In some situations, individuals first learn they are under investigation when federal agents request an interview or execute a search warrant at their home or business. Even if agents describe the conversation as voluntary, speaking with investigators without a federal criminal defense attorney can significantly affect your legal rights and the outcome of your case.
What Happens After Federal Gun Charges Are Filed?
Once federal prosecutors decide to pursue criminal charges, the case typically follows the federal criminal court process. Although every case is different, the process often includes:
• A criminal complaint or grand jury indictment
• Arrest or voluntary surrender
• Initial appearance before a federal magistrate judge
• Detention or bond hearing
• Discovery and pretrial litigation
• Plea negotiations or trial
• Sentencing, if convicted
Federal criminal cases are prosecuted by Assistant United States Attorneys in U.S. District Court rather than by local district attorneys. If you’re facing federal gun charges and want to better understand what to expect, read our guide on what happens after you’re arrested on a federal charge.
Why Early Legal Intervention Matters in Federal Firearm Investigations
“Many people assume they don’t need a lawyer until they’re arrested. In federal firearm cases, that’s often too late. By the time federal agents contact someone, investigators may have already spent weeks or even months gathering evidence through surveillance, search warrants, financial records, digital evidence, or confidential informants. Seeking legal guidance early—before speaking with investigators—can help protect your rights and ensure you understand your legal options.”
San Diego Criminal Defense Attorney Samantha Greene, Sevens Legal Criminal Lawyers
Common Misconceptions About Federal Firearm Charges
Only violent gun crimes are prosecuted in federal court.
Not true. Many federal firearm prosecutions involve alleged possession or transfer offenses rather than violent conduct.
If I legally own a firearm in California, I can’t face federal gun charges.
Not necessarily. A firearm that complies with California law may still raise federal legal issues depending on how it was purchased, transferred, modified, transported, or possessed. State and federal firearm laws don’t always overlap.
If I wasn’t arrested immediately, I’m probably not under investigation.
Federal firearm investigations often begin long before an arrest is made. The ATF and other federal agencies may spend weeks or months gathering evidence before charges are filed.
Federal gun charges only apply if the gun crossed state lines.
Not necessarily. A firearm does not always have to cross state lines for federal charges to apply. Federal firearm laws also cover certain prohibited persons, false statements during firearm purchases, machine guns and other regulated firearms, and other conduct prohibited by federal law.
Final Legal Takeaway
Federal gun charges can involve different laws, penalties, and defense issues depending on the alleged conduct. The specific statute, available evidence, and stage of the federal investigation can all affect how a case should be approached. If federal agents have contacted you or you believe you are under investigation, understanding your legal options before responding can help protect your rights.
FAQs About Federal Gun Charges: Common Firearm Crimes Prosecuted in Federal Court
What makes a gun crime federal?
A gun crime may be prosecuted in federal court if it violates federal firearms laws, involves interstate commerce, occurs on federal property, or is investigated by a federal agency such as the ATF or FBI.
What agency investigates federal gun charges?
The ATF is the primary federal agency responsible for investigating firearm offenses. Depending on the circumstances, the FBI, Homeland Security Investigations (HSI), Drug Enforcement Administration (DEA), and other federal agencies may also participate in an investigation.
Can I face both state and federal gun charges?
Yes. In some situations, the same conduct may violate both California and federal law. Whether prosecutors pursue one jurisdiction, both, or coordinate between agencies depends on the facts of the case.
Are federal gun charges more serious than California gun charges?
Federal firearm charges often carry significant penalties, including lengthy prison sentences, substantial fines, and long periods of supervised release. However, the potential consequences depend on the specific offense, criminal history, and other factors unique to each case.
What should I do if federal agents contact me?
If federal agents ask to speak with you or execute a search warrant, avoid answering questions without an attorney present. Even voluntary conversations can have serious legal consequences.
Free San Diego Federal Firearm Defense Consultation
If you are under investigation for a federal firearm offense or have already been charged, obtaining experienced legal representation as early as possible can make a significant difference. Federal firearm cases often involve lengthy investigations, complex statutes, and serious penalties. At Sevens Legal, we provide a free legal consultation for clients facing federal criminal charges throughout San Diego.
How to Contact Our Criminal Defense Attorneys
If you have questions about federal gun charges or believe you are under investigation by the ATF, FBI, or another federal agency, contact Sevens Legal Criminal Lawyers today at (858) 777-7777 to speak to our experienced San Diego federal crimes lawyers.
Primary Sources for this Article
Legal Statutes
• U.S. Code, Title 18, Chapter 44 (Firearms)
• 18 U.S.C. § 922 – Unlawful Acts
• 18 U.S.C. § 924 – Penalties
• 18 U.S.C. § 922(g) – Prohibited Persons
• 18 U.S.C. § 933 – Trafficking in Firearms
Government Resources
• Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) – Firearms
• National Firearms Act Handbook (ATF)
• U.S. Department of Justice – Criminal Division
• United States Sentencing Commission – Firearms Offenses
• National Firearms Act (NFA)
• U.S. Sentencing Guidelines
• ATF Form 4473
Federal Courthouse in San Diego
U.S. District Court for the Southern District of California
Sevens Legal Criminal Lawyers is led by Samantha Greene, Certified Criminal Law Specialist (State Bar of California Board of Legal Specialization), Dan Greene, Trial Lawyer of the Year (2019, Criminal Defense Bar Association of San Diego), and Kerry Steigerwalt, AV Preeminent® Rated (Martindale-Hubbell) for 10+ years. Our attorneys bring decades of combined criminal defense experience.
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Disclaimer: This post is for informational purposes only and does not constitute legal advice or create an attorney-client relationship. Past results do not guarantee future outcomes. Each case is unique and should be evaluated by a qualified attorney. For legal advice, please contact our office directly.