Delaware Ghost Gun & Unserialized Firearm Laws
A practical guide to Delaware laws governing untraceable firearms, unfinished frames and receivers, privately made firearms, serialization, removed serial numbers and 3D-printed firearms — including the 2026 compliance process created by House Bill 418.
Updated September 2026
Unfinished frames: § 1459A
Altered serial numbers: § 1459
2026 update: HB 418 / 85 Del. Laws, c. 469
Delaware created a compliance path for certain previously possessed unserialized firearms
House Bill 418 was signed on September 3, 2026 and took effect immediately. The law preserves Delaware’s prohibition on untraceable firearms while creating a way for certain people who lawfully possessed an unserialized firearm or unfinished frame or receiver before the law’s effective date — or who later move into Delaware with one lawfully acquired elsewhere — to bring the item into compliance.
A qualifying person must generally act within 6 months by either having the firearm or unfinished frame or receiver properly serialized by a federally licensed firearm dealer or manufacturer, or by rendering it permanently inoperable as defined by Delaware law.
Key date for qualifying existing Delaware residents: March 3, 2027
For a person who qualifies based on lawful possession before September 3, 2026, the six-month statutory compliance period runs to March 3, 2027. A person who later establishes Delaware residency may have a different deadline because the statute uses the later of six months after establishing residency or six months after the Act’s effective date.
Not every firearm without a visible serial number is treated the same
Delaware uses several separate statutes. An untraceable firearm, an unfinished frame or receiver, and a firearm whose original serial number was removed or altered can fall under different provisions.
Untraceable Firearm
Delaware generally prohibits knowing possession, manufacture, assembly, sale or transfer of an untraceable firearm, subject to the new 2026 compliance provision and statutory exclusions.
Unfinished Frame or Receiver
Delaware separately regulates unfinished firearm frames and receivers that lack the required manufacturer information and serial number.
Removed or Altered Serial Number
A firearm that originally had an importer or manufacturer serial number that was removed, obliterated or altered is governed by a separate felony statute.
What is an “untraceable firearm” in Delaware?
Delaware law defines an untraceable firearm as a firearm for which the sale or distribution chain from a licensed retailer to the point of its first retail sale cannot be traced by law-enforcement officials.
The term “ghost gun” is commonly used in public discussion, but Delaware’s criminal statutes use more specific terms such as untraceable firearm and unfinished firearm frame or receiver.
A firearm without a modern serial number is not automatically an “untraceable firearm.” Delaware’s statutory definition excludes certain older firearms, muzzle-loading firearms and qualifying replicas of antique firearms.
What does Delaware prohibit?
Subject to the statutory compliance provision discussed below, Delaware law makes it a crime to knowingly possess an untraceable firearm. The law also prohibits knowingly manufacturing, assembling, causing the manufacture or assembly of, selling or transferring an untraceable firearm.
Under § 1463, knowing possession of an untraceable firearm is a class E felony. Manufacturing an untraceable firearm, or prohibited manufacture or distribution involving a 3D printer, is a class D felony.
How can a qualifying previously possessed unserialized firearm be brought into compliance?
HB 418 created a limited compliance process for a person who lawfully possessed an unserialized firearm before September 3, 2026, or who lawfully acquired the firearm in another jurisdiction and later established Delaware residency.
Have it properly serialized
A federally licensed firearm dealer or federally licensed firearm manufacturer may imprint the required serial number in accordance with federal law and applicable marking requirements.
Render it permanently inoperable
The firearm or unfinished frame or receiver may instead be permanently disabled in the manner recognized by Delaware law. Simply removing parts, disassembling it or temporarily disabling it is not enough.
The compliance provision is not a general amnesty for every unserialized firearm
The statutory language applies to a person who meets the specific lawful-possession or lawful-acquisition criteria. It should not be read as authorizing new private manufacture of unserialized firearms after September 3, 2026, or as curing a firearm whose original manufacturer or importer serial number was unlawfully removed or altered.
What happens when an FFL serializes the firearm?
HB 418 allows a federally licensed firearm dealer or federally licensed firearm manufacturer to serialize a qualifying firearm or unfinished frame or receiver. The marking must comply with federal serialization requirements, including applicable minimum size and depth standards, and the licensee must maintain the required records.
The statute expressly provides that a temporary transfer solely for the purpose of lawful serialization is not itself unlawful possession, manufacture or transfer under the covered provisions.
Returning the newly serialized firearm or unfinished frame or receiver to the owner is treated as a transfer and is subject to a background check under 11 Del. C. § 1448A.
If the person cannot lawfully receive the newly serialized item following the required background check, the statute directs the licensee to surrender the item to law enforcement.
The law authorizes qualified federal licensees to perform serialization, but it does not require every dealer to offer the service. Confirm that the licensee provides serialization services and will accept the particular firearm or frame before transporting it to the business.
What does “permanently inoperable” mean?
HB 418 added a specific definition. The firearm must be incapable of discharging a projectile by means of an explosive and incapable of being readily restored to a functional state. Cosmetic damage, partial disassembly, removal of parts or temporary disabling does not qualify.
The alteration must be irreversible and not susceptible to restoration through ordinary tools or commonly available equipment. The law identifies methods such as permanently altering the frame or receiver so it cannot accept fire-control components, permanently welding or obstructing the barrel, or destroying the frame or receiver in a manner consistent with applicable federal firearm-destruction standards.
A firearm that can readily be restored by reinstalling components does not satisfy the statutory permanent-inoperability standard.
Delaware law on unfinished firearm frames and receivers
Delaware defines an unfinished firearm frame or receiver as a frame or receiver that requires further machining or molding before it can be used as part of a functional firearm and that is designed and intended for use in assembling a functional firearm.
Section 1459A generally prohibits knowing possession of an unfinished frame or receiver that lacks the required manufacturer information and individual serial number, and it restricts transport, shipment, transfer and sale of such items. Possession of an unfinished firearm frame or receiver with no serial number is a class D felony.
A person who meets the 2026 law’s lawful-possession or new-resident criteria may retain the unfinished frame or receiver only by complying within the statutory six-month period through serialization or permanent inoperability.
What if a firearm’s original serial number was removed or altered?
That is a different issue from a firearm that was originally made without a serial number. Section 1459 prohibits knowingly transporting, shipping, possessing or receiving a firearm or firearm frame or receiver when the person knows the importer or manufacturer serial number was removed, obliterated or altered in a way that disguised or concealed the firearm’s identity or origin.
A violation of § 1459 is a class D felony. The section contains an exception for a firearm manufactured prior to 1973.
The 2026 serialization process should not be assumed to legalize possession of a firearm whose original manufacturer or importer serial number was intentionally removed, obliterated or altered.
Does Delaware regulate 3D-printed firearms?
Yes. Section 1463 separately addresses use of a 3D printer or similar device to manufacture or produce a firearm, firearm receiver or major firearm component when the person is not licensed as a manufacturer.
The statute also addresses distribution of digital files or other electronic instructions capable of programming a 3D printer to manufacture a firearm, receiver or major firearm component to a person who is not licensed as a manufacturer.
Manufacturing or prohibited distribution involving a 3D printer under § 1463 is classified as a class D felony.
What firearms are excluded from Delaware’s “untraceable firearm” definition?
The statutory definition of “untraceable firearm” excludes the following categories:
A qualifying firearm manufactured prior to 1968 is excluded from the statutory definition of an untraceable firearm.
Muzzle-loading firearms designed to use black powder or its equivalent are excluded.
Firearms designed as replicas of antique firearms originally manufactured prior to 1898 are also excluded from the definition.
Do not confuse the pre-1968 exclusion in the “untraceable firearm” definition with the separate pre-1973 exception in Delaware’s removed-or-altered-serial-number statute.
What if I move to Delaware with a privately made or unserialized firearm?
HB 418 expressly addresses a person who lawfully acquired an unserialized firearm or unfinished frame or receiver in another jurisdiction and later establishes residency in Delaware.
A person who qualifies must bring the item into compliance within 6 months after establishing Delaware residency or within 6 months after September 3, 2026, whichever is later.
The new-resident provision is tied to lawful acquisition in another jurisdiction. Moving an item across state lines does not erase federal law, the law of the state where it was acquired, or other Delaware firearm restrictions.
Before taking an unserialized firearm to a dealer
Do not assume that every Federal Firearms Licensee offers serialization or will accept every unserialized firearm or unfinished frame or receiver. Contact the dealer first and describe the item accurately.
Dealers must also comply with federal marking, acquisition-and-disposition recordkeeping, transfer and background-check requirements. A person should not attempt to add a homemade serial number and assume that doing so satisfies Delaware’s statutory process.
Frequently asked questions
Are ghost guns legal in Delaware?
Delaware generally prohibits knowing possession of an “untraceable firearm” as defined by state law. HB 418 created a limited compliance process for qualifying firearms lawfully possessed before September 3, 2026 and for certain lawful acquisitions by people who later move into Delaware.
Can I simply engrave my own serial number on an unserialized firearm?
Not for purposes of the HB 418 compliance pathway. The statute calls for serialization by a federally licensed firearm dealer or federally licensed firearm manufacturer in accordance with federal marking and recordkeeping requirements.
Is there a deadline to serialize a qualifying firearm?
Yes. A qualifying person must comply within six months after establishing Delaware residency or six months after September 3, 2026, whichever is later. For a qualifying existing Delaware resident relying on the September 3, 2026 effective date, that six-month date is March 3, 2027.
Does an FFL have to run a background check when returning the serialized firearm?
Yes. HB 418 states that return of the newly serialized firearm or unfinished frame or receiver constitutes a transfer subject to a background check under 11 Del. C. § 1448A.
Does removing the firing pin make the firearm permanently inoperable?
No. Delaware’s 2026 definition requires an irreversible alteration that cannot readily be restored with ordinary tools or commonly available equipment. Partial disassembly or simply removing components does not satisfy the definition.
What if the factory serial number was scratched off or ground away?
That situation is governed by the separate removed-or-altered-serial-number statute, 11 Del. C. § 1459. It should not be treated as the same thing as a privately made firearm that never had a manufacturer or importer serial number.
Are old firearms without serial numbers automatically illegal?
No. Delaware’s “untraceable firearm” definition specifically excludes firearms manufactured prior to 1968, certain muzzle-loading firearms and qualifying replicas of antique firearms. Other laws can still apply.
Can I manufacture a new unserialized firearm for personal use in Delaware?
Delaware’s untraceable-firearm law prohibits conduct that can include knowingly manufacturing or assembling an untraceable firearm. The 2026 compliance provision applies to qualifying previously possessed items and certain lawful new-resident acquisitions; it should not be read as authorization to manufacture a new unserialized firearm.
Official sources
Legal information, not legal advice.
DelawareGunLaws.com is an independent educational resource and is not affiliated with the State of Delaware or any government agency. Ghost-gun and unserialized-firearm laws can involve overlapping Delaware and federal requirements, and the legality of a particular firearm can depend on when and how it was made, acquired, marked and possessed. Verify the current Delaware Code, session laws, federal regulations and applicable agency guidance before relying on this information.
Buying a Firearm in Delaware
Learn about Delaware purchase requirements, background checks, the Permit to Purchase system and dealer transfers.