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Federal Gun Charges Lawyer Honolulu, HI

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Last Updated: July 22, 2026

When federal prosecutors add a gun charge in Honolulu, HI, the stakes can climb fast. A case that was already serious may suddenly carry mandatory incarceration, consecutive sentencing, property forfeiture, and permanent limits on firearm ownership. These prosecutions are often built by the ATF and the U.S. Attorney’s Office alongside allegations of federal drug crimes, conspiracy, robbery, or violent conduct.

The gun does not have to be used in the way most people imagine. Federal charges may grow out of constructive possession, a straw purchase, false statements to a dealer, access to an unregistered weapon, or a firearm found near alleged criminal activity. In some cases, the firearm allegation is what turns a difficult prosecution into one carrying years of additional prison exposure.


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Combs Waterkotte represents clients in Honolulu, HI when a federal firearm investigation puts their freedom and future on the line. Our federal criminal defense attorneys serving Honolulu, HI dig into the government’s theory from every angle, including where the gun was found, who allegedly controlled it, how officers obtained the evidence, and whether the weapon had any real connection to another offense.

If you have been arrested, received a target letter, learned that ATF agents are investigating you, or believe federal charges may be coming, contact us online or call (314) 900-HELP immediately. What happens before an indictment can shape the entire case.

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    Below, we explain:

    • Why some gun cases are prosecuted federally instead of by the state
    • How to respond if agents, subpoenas, or a target letter signal an investigation
    • Possession, trafficking, straw purchase, NFA, and related firearm offenses
    • The penalties that can be added to another federal sentence
    • How prior convictions can trigger ACCA exposure
    • When to bring in a federal firearm defense attorney


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    When Does a Firearm Case Become Federal?

    Most firearm cases begin under state law. However, a case may enter the federal system when the alleged conduct violates the federal Gun Control Act, the National Firearms Act, or another federal statute. State and local authorities may also refer a case to federal prosecutors when they believe federal penalties will be more severe.

    Common reasons a firearm case enters federal court include:

    • A firearm traveled through interstate or foreign commerce
    • The accused is legally prohibited from possessing firearms or ammunition
    • A firearm was allegedly used during a drug trafficking crime or crime of violence
    • The case involves firearm trafficking, smuggling, straw purchasing, or unlicensed dealing
    • The weapon is a machine gun, silencer, short-barreled rifle, short-barreled shotgun, or destructive device
    • The firearm had an altered or removed serial number
    • The alleged conduct occurred on federal property or involved a federal investigation
    • Federal agents believe the firearm is connected to organized criminal activity

    The first sign of trouble may come late in the investigation. Agents may already have traced the gun, interviewed witnesses, reviewed online activity, pulled phone data, and gathered physical evidence before the accused knows federal prosecutors are involved.



    What to Do During a Federal Firearms Investigation in Honolulu, HI

    You do not have to be arrested to need a federal defense attorney. By the time ATF agents contact you, execute a search warrant, or ask to speak with you, they may have already spent weeks or months building their case. What you do next can significantly affect the outcome.

    If federal agents may be building a gun case against you:

    • Do not try to talk your way out of it. Federal agents are trained interviewers, and even an accurate answer can be taken out of context or compared against other evidence. Tell them you want a federal gun charges attorney in Honolulu, HI, then stop answering questions.
    • Respect the warrant without surrendering extra ground. Never interfere with a lawful search, but do not sign consent forms or casually authorize agents to search beyond what the warrant permits.
    • Preserve records that may tell your side of the story. That may include firearm receipts, transfer documents, text messages, emails, photos, location records, and communications with sellers or buyers.
    • Do not contact witnesses or codefendants about the investigation. A message meant to “get everyone on the same page” can be interpreted as witness tampering or obstruction.
    • Get legal representation before the government makes the next move. Early intervention may give your attorney time to investigate, preserve favorable evidence, communicate with prosecutors, and prepare for a search, arrest, or indictment.


    Federal Weapons Charges You May Face in Honolulu, HI


    Felon in Possession of a Firearm

    The phrase “felon in possession” covers only part of 18 U.S.C. § 922(g). The statute reaches multiple classes of people barred from possessing guns or ammunition, even when the firearm was never fired or displayed.

    A person may be legally barred from possessing a gun or ammunition because of:

    • People convicted of crimes punishable by more than one year in prison
    • Fugitives from justice
    • Unlawful users of controlled substances
    • Certain people subject to domestic violence restraining orders
    • People convicted of qualifying domestic violence offenses
    • Certain noncitizens and people dishonorably discharged from the military

    A conviction ordinarily requires more than showing that a gun was nearby. The government generally must prove knowing possession and that the accused knew they belonged to the category that prohibited possession.

    Federal firearm possession is commonly divided into two categories:

    • Actual possession: The accused allegedly carried the firearm or had it physically on their body.
    • Constructive possession: The accused allegedly knew where the gun was and had both the power and intent to exercise control over it.

    Shared spaces create room for reasonable doubt. If the firearm was found in a jointly occupied apartment, another person’s car, a motel room, or an area open to multiple people, prosecutors still must tie the accused personally to the weapon.

    Using, Carrying, or Possessing a Gun Under 18 U.S.C. § 924(c)

    A gun found in the orbit of another federal case can dramatically raise the stakes. Section 924(c) creates a separate offense for certain firearm conduct connected to qualifying drug trafficking or violent crimes.

    A § 924(c) sentence is generally stacked on top of the punishment for the underlying crime rather than served at the same time:

    • A five-year minimum for qualifying possession, use, or carrying
    • A seven-year minimum when prosecutors prove brandishing
    • A 10-year minimum when the firearm was discharged
    • Longer mandatory terms for certain machine guns, suppressors, and destructive devices

    A § 924(c) theory may rest entirely on where the gun was found. The government often argues that proximity to the following items shows the firearm was kept to further the alleged crime:

    • Illegal drugs
    • Cash
    • Packaging materials
    • Distribution records
    • Other alleged evidence of trafficking

    Proximity alone may not tell the whole story. The defense may argue that the firearm belonged to someone else, was inaccessible, was present for an unrelated lawful reason, or did nothing to promote the alleged offense.

    False Actual-Buyer Allegations

    A lawful-looking retail purchase can become a federal case when agents believe the named buyer was only standing in for another person. These straw purchase investigations often center on what the buyer intended and what they reported on Form 4473. Prosecutors may also rely on 18 U.S.C. § 932.

    These cases may depend on:

    • Payment apps, cash withdrawals, or reimbursements
    • Who researched, requested, or picked out the firearm
    • The buyer’s plan before entering the store
    • Whether the gun was genuinely purchased as a gift
    • Whether the eventual recipient was prohibited or intended to use the firearm unlawfully

    Potential evidence may include text messages, payment records, store surveillance, purchase forms, and statements made to investigators.

    Firearms Trafficking

    18 U.S.C. § 933 prohibits certain transfers, transportation, or receipt of firearms when the accused knows or has reasonable cause to believe the firearm will be used, possessed, or transferred unlawfully.

    Firearms trafficking allegations may involve weapons that were:

    • Purchased for prohibited persons
    • Moved across state or international borders
    • Sold to people involved in drug trafficking or violent crime
    • Acquired through multiple straw purchasers
    • Resold without a required license
    • Smuggled into another country

    When Private Gun Sales Become Federal Charges

    The legal line between a private seller and an unlicensed firearms dealer depends on the surrounding facts. Federal law generally requires an FFL when someone is engaged in firearm sales as a business, but it does not convert every personal transfer into a federal crime.

    There is no single fact that settles the issue. Investigators may review:

    • The volume and regularity of transactions
    • How long the accused kept each firearm before selling it
    • Whether buyers were solicited through websites, forums, or personal networks
    • Cash, electronic payments, and customer conversations
    • Whether the sales produced or were intended to produce profit
    • Evidence of inventory, repeat customers, or ongoing operations

    False Information Given to a Licensed Gun Dealer

    Federal prosecutors may charge a person for allegedly lying to a licensed firearms dealer about a fact that could affect the transaction. Section 922(a)(6) generally requires proof that the statement was knowingly false and material to the legality of the purchase.

    Federal investigators may focus on statements about:

    • The identity of the actual purchaser
    • A prior criminal conviction
    • Controlled substance use
    • A domestic violence conviction or restraining order
    • Immigration or citizenship status
    • Residence or identification information

    The defense may challenge whether the answer was actually false, whether the accused knowingly provided incorrect information, and whether the statement affected the legality of the transaction.

    Federal Charges Involving an Altered Firearm Serial Number

    A damaged or missing serial number can create separate federal exposure. Under 27 CFR § 478.34, the government may prosecute certain knowing possession, transportation, or receipt of a firearm with altered identifying marks.

    The serial number itself is only part of the case. Other issues include:

    • Whether the alteration was visible or known to the accused
    • Whether the serial number was legally “removed, obliterated, or altered”
    • What laboratory testing reveals about the original markings
    • Whether prosecutors can prove knowing possession of that specific gun

    A firearm with a removed or changed serial number may add another rung to the sentencing ladder through a federal guideline enhancement.

    “Ghost Gun” Investigations

    Not every homemade firearm violates federal law. The legal trouble often comes from who possessed it, whether it was made or sold as part of a business, whether required markings were present, or whether the gun was tied to separate criminal conduct.

    Whether charges apply may depend on:

    • Who possessed the firearm
    • How it was manufactured
    • Whether it was transferred or sold
    • Whether the accused was acting as a firearms manufacturer or dealer
    • Whether required markings were missing
    • Whether the firearm was connected to other illegal conduct

    A privately made firearm can also affect sentencing if prosecutors claim it lacked markings required by federal law.

    National Firearms Act Violations

    The National Firearms Act imposes registration, taxation, manufacturing, and transfer requirements on certain weapons and devices.

    Weapons and devices commonly regulated by the NFA include:

    • Machine guns
    • Short-barreled rifles
    • Short-barreled shotguns
    • Silencers and suppressors
    • Destructive devices
    • Certain weapons classified as “any other weapon”

    Federal agents may bring NFA charges when they believe a regulated item was never registered, was made or transferred without approval, or had required markings removed. The potential consequences include substantial fines, forfeiture, and up to a decade in federal custody.



    Federal Firearm Sentences in Honolulu, HI

    There is no universal sentence for a federal gun conviction. Prison exposure can change based on the charge, the firearm involved, prior convictions, any connection to another alleged crime, and the calculation required by the federal sentencing guidelines.

    Federal Gun Offense Potential Penalty
    Unlawful firearm possession by a prohibited person under § 922(g) Generally up to 15 years in federal prison; qualifying Armed Career Criminal Act cases carry a mandatory minimum of 15 years
    Possessing, carrying, or using a firearm during a drug trafficking crime or crime of violence under § 924(c) Five years or more added to the underlying sentence, with seven years for brandishing and 10 years for firing the weapon
    Buying a firearm for another person under § 932 As much as 15 years, with enhanced exposure of up to 25 years in qualifying aggravated cases
    Federal gun trafficking under § 933 Up to 15 years in federal prison
    Engaging in the business of firearm sales without federal licensing A possible federal sentence of as much as five years
    Lying about material information during a federally regulated gun sale Potential imprisonment for up to 10 years
    Possessing a firearm with an altered or obliterated serial number under § 922(k) Typically punishable by as much as five years, and the serial-number issue may also raise the guideline range
    National Firearms Act violations As much as 10 years of imprisonment along with fines and forfeiture
    Unlawful possession, receipt, or transfer of a machine gun A possible 10-year sentence on the machine gun charge alone, with more severe consequences if § 924(c) or another enhancement applies


    The penalties listed above are starting points, not predictions. The sentence in a particular case may rise or fall based on the statute charged, the number and type of weapons, prior convictions, any mandatory minimum, and the calculation required by the federal sentencing guidelines.

    Additional penalties and long-term consequences may include:

    The number announced in court matters. Federal prisoners do not have access to conventional parole, and good-time reductions are limited, so the sentence served is usually close to the sentence ordered.

    The Armed Career Criminal Act

    The Armed Career Criminal Act, commonly called the ACCA, can transform a felon-in-possession case into one carrying a mandatory minimum sentence of 15 years.

    The enhancement may apply when a person convicted under 18 U.S.C. § 922(g) has three qualifying prior convictions for violent felonies, serious drug offenses, or both, committed on occasions different from one another.

    Prior convictions do not count merely because prosecutors call them violent or serious. Courts may need to dissect the elements of the earlier statute, examine a limited set of judicial records, and apply federal appellate and Supreme Court decisions that continue to shape ACCA law.

    An experienced Honolulu, HI federal gun charges lawyer may challenge:

    • Whether the statute of conviction is broader than ACCA’s federal definition
    • Whether the government can prove the specific subsection or elements involved
    • The timing, location, and relationship between the alleged prior offenses
    • Vacatur, expungement, pardon, or other relief affecting a conviction
    • Any restoration of civil and firearm rights

    An ACCA case can hinge on a single prior offense. If one conviction does not qualify, the mandatory minimum may no longer apply, potentially removing years from the defendant’s exposure.

    How Sentencing Enhancements Can Increase a Federal Gun Sentence

    The sentence in a federal firearm case is influenced by more than the statute itself. Even when the law does not require a mandatory minimum prison term, guideline enhancements may substantially increase the advisory sentencing range.

    The advisory guideline range may increase if the government proves factors such as:

    • The quantity of firearms involved
    • Whether any firearm was stolen
    • Defaced or missing identifying markings
    • Transfers to prohibited persons or alleged trafficking schemes
    • Possession of specially regulated NFA firearms or devices
    • A connection between the firearm and separate felony conduct
    • Reckless behavior during an attempted escape
    • An alleged leadership or supervisory role
    • Conduct the government claims obstructed the investigation or prosecution

    Although the guidelines are no longer mandatory, federal judges are still required to calculate and consider them before imposing sentence. An experienced defense attorney may contest proposed enhancements, introduce favorable evidence, request departures or variances, and argue that a lower sentence better satisfies federal sentencing law.

    When to Call a Federal Gun Defense Attorney

    Federal investigations often begin long before anyone is arrested. Speaking with a federal defense lawyer as soon as you suspect you are involved may help protect your rights from the very beginning.

    Warning signs include:

    • Federal agents ask to interview you
    • Your home, vehicle, or business is searched pursuant to a warrant
    • A friend, family member, or coworker is served with a subpoena
    • Investigators seize guns, electronic devices, documents, or financial records
    • You receive a target letter from federal prosecutors
    • Someone allegedly connected to the investigation is arrested
    • Your state criminal case suddenly stalls or disappears without explanation
    • You hear that the U.S. Attorney’s Office is reviewing the matter

    Getting a lawyer involved early may allow your attorney to deal directly with investigators, advise you before questioning occurs, preserve favorable evidence, evaluate search issues, assess your potential exposure, and advocate with prosecutors before formal charges are filed.



    Get Help With Federal Firearm Charges in Honolulu, HI

    Combs Waterkotte defends clients from Honolulu, HI and across the country against serious federal criminal allegations. Our team includes former prosecutors who know how the government builds firearm cases from the investigation through trial.

    Our defense begins with a hard look at how the case was built. That may mean attacking an unlawful search, exposing weaknesses in witness testimony, disputing possession, and fighting guideline enhancements that could add years to the sentence.

    If a negotiated resolution serves your interests, we pursue it with leverage built through preparation. If the government will not offer a fair outcome, we are ready to litigate the case in court.

    With decades of combined criminal defense experience, a dedicated investigator on staff, and a record of defending clients against some of the most serious state and federal charges, our team has the resources and experience to handle high-stakes firearm cases from investigation through trial and appeal.

    If federal agents are investigating you or charges have already been filed, now is the time to protect yourself. Contact Combs Waterkotte online or call (314) 900-HELP to speak with an experienced federal gun charges attorney serving Honolulu, HI.

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