Privately Made Firearms (PMFs)—commonly known as "ghost guns"—have become a central focus of law enforcement and regulatory enforcement across Southern California. As untraceable, home-assembled firearms without federal serial numbers proliferate, the City of Los Angeles has taken aggressive legal and legislative action.
Through civil lawsuits against major kit manufacturers like Polymer80, local municipal bans on ghost gun parts, and strictly enforced state serialization mandates under California Penal Code § 29180, local authorities are aggressively cracking down on the sale, possession, and manufacture of unserialized firearm components.
What Are Ghost Guns and Why Do They Pose Public Safety Risks?
A ghost gun is a fully functional, self-assembled firearm built from unregulated, unfinished parts—such as an "80% lower receiver" or "frame kit."
Because these components were historically sold online without requiring a federal background check, a unique serial number, or a Licensed Firearms Dealer (FFL) transfer, they allowed prohibited persons—including felons and juveniles—to obtain firearms illegally.
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Untraceable Operations: Without a serial number, law enforcement cannot trace a recovered firearm from its manufacturer to the original purchaser through ATF eTrace databases.
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Rapid Proliferation in Crime: Los Angeles Police Department (LAPD) recovery statistics show that approximately 40% of all firearms recovered at crime scenes across Los Angeles lack serial numbers, with a significant concentration in South L.A.
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Federal Recovery Data: According to the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), California law enforcement agencies recover thousands of PMFs annually, with the vast majority trace-linked to Polymer80 receiver kits.
Legal Actions Taken by Los Angeles: The Polymer80 Lawsuit and Municipal Bans
To stem the flow of untraceable firearms into local communities, the City of Los Angeles executed a multi-pronged enforcement strategy targeting both manufacturers and individual possessors:
1. Civil Litigation Against Polymer80
Partnering with Everytown Law, the Los Angeles City Attorney's Office filed a major civil lawsuit against Nevada-based Polymer80, Inc., one of the nation's largest sellers of ghost gun kits. The suit alleged that Polymer80 violated state and federal law, created a public nuisance, and engaged in false advertising by telling consumers that buying complete "Buy Build Shoot" kits without a background check was lawful.
2. City Ordinance Regulating Unfinished Receivers
The Los Angeles City Council passed municipal ordinances making it illegal to possess, purchase, sell, transport, or receive untraceable, unserialized firearm frames or receivers within city limits. Under local law, possessing an unfinished frame without a valid state or federal serial number is an arrestable misdemeanor.
California Ghost Gun Laws: Penal Code § 29180 Requirements
California enforces some of the strictest firearm assembly statutes in the United States. Under California Penal Code §§ 29180 through 29184 (enacted via Senate Bill 746), individuals who wish to manufacture or assemble a firearm must comply with strict Department of Justice (DOJ) procedures:
Mandatory Steps to Assemble a Firearm in California
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Apply for a Unique Serial Number: Prior to manufacturing or assembling any firearm, the individual must submit an application to the California DOJ for an officially designated serial number.
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Pass Background Eligibility: Applicants must possess a valid Firearm Safety Certificate (FSC), present proof of age (must be 21 or older), and pass a full DOJ firearm eligibility background check.
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Engrave the Assigned Serial Number: Within 10 days of receiving the serial number or completing assembly, the individual must permanently engrave or affix the state-assigned identification mark onto the metal frame or receiver to exact statutory depths and standards.
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Prohibition on Transfer: Self-assembled firearms manufactured in California cannot be legally sold, transferred, or assigned to another party.
Criminal Penalties for Unlawful Possession in Los Angeles
Possessing, assembling, or transferring an unserialized firearm or unfinished receiver in Los Angeles carries severe legal consequences under both the California Penal Code and local city municipal codes:
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Unlawful Manufacturing (PC § 29180): Assembling a firearm without applying for and receiving a DOJ serial number is a misdemeanor punishable by up to one year in county jail per count, substantial fines, and permanent loss of firearm rights.
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Possession of Unfinished Receivers: Transporting or possessing non-serialized 80% frames within L.A. city limits exposes individuals to municipal criminal charges.
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Sentence Enhancements: If a ghost gun is possessed or used in connection with an underlying felony (such as weapons carry, drug sales, or violent offenses), prosecutors will pursue mandatory consecutive prison sentence enhancements.
Frequently Asked Questions (FAQs)
What is considered a ghost gun under California law?
Under California law, a ghost gun is any privately made firearm (PMF) assembled from individual parts, unfinished receivers (80% lowers), or 3D-printed materials that lacks an official serial number issued by a federally licensed manufacturer or the California Department of Justice.
Is it legal to own an 80% lower receiver in Los Angeles?
No. While federal regulations historically permitted the sale of unfinished frames, California law and Los Angeles city ordinances prohibit purchasing, possessing, transferring, or selling non-serialized unfinished frames or lower receivers unless they have been officially serialized by the California DOJ prior to acquisition.
Can you legally serialize a home-built gun in California?
Yes, but only by following strict statutory procedures. Before assembling any firearm, you must apply to the California DOJ for a unique serial number, pass a firearm background check, meet all eligibility criteria, and permanently engrave the issued serial number onto the frame within 10 days of assembly.
What are the criminal penalties for possessing an unserialized ghost gun in Los Angeles?
Possessing or building an unserialized firearm in California is typically charged as a misdemeanor under Penal Code § 29180, carrying penalties of up to one year in county jail, fines, and forfeiture of the weapon. However, if the possessor is a prohibited person (such as a convicted felon) or if the gun is concealed or loaded in public, charges can escalate to a felony punishable by multi-year prison sentences.
How are Los Angeles law enforcement agencies detecting ghost guns?
The LAPD and ATF utilize specialized gun violence reduction task forces to intercept illegal online sales, conduct undercover operations targeting non-compliant dealers, inspect local gun shows, and perform forensic ballistics analyses on all recovered firearms to identify illicit manufacturing rings.
