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Federal Gun Charges Lawyer St. Petersburg, FL

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Last Updated: July 22, 2026

When federal prosecutors add a gun charge in St. Petersburg, FL, 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.

Federal prosecutors do not always need to prove that a weapon was fired, brandished, or even carried. A case may rest on alleged possession, access to a firearm, a purchase made for another person, inaccurate information on federal paperwork, or the ownership of a regulated weapon. In St. Petersburg, FL, those allegations can substantially increase the punishment tied to a separate federal offense.


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Combs Waterkotte defends people in St. Petersburg, FL facing high-stakes federal investigations and prosecutions throughout the United States. Our St. Petersburg, FL federal criminal defense lawyers examine how the firearm was discovered, whether prosecutors can prove knowing possession, whether the weapon was connected to another alleged crime, and whether law enforcement violated your constitutional rights.

You should not wait for an indictment to start protecting yourself. If ATF agents have contacted you, you have received a federal target letter, or you believe an arrest or charge is on the horizon, call (314) 900-HELP or contact Combs Waterkotte online. Early decisions often set the board for everything that follows.

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    Below, we explain:

    • What gives the federal government authority over a firearm case
    • What not to do when you learn you are under investigation
    • Which federal gun charges prosecutors commonly file
    • How consecutive sentences and enhancements can increase prison exposure
    • Why the Armed Career Criminal Act can change the entire case
    • How a federal gun charges lawyer can intervene


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    When Does a Firearm Case Become Federal?

    Not every federal gun case begins with federal agents at the door. Many start as ordinary state arrests before a task force or U.S. Attorney’s Office steps in. That can happen when the alleged conduct fits a federal offense under the Gun Control Act, the National Firearms Act, or another federal firearms law. Once that happens, the case moves onto a very different playing field.

    A gun case may draw federal attention when:

    • The government claims the firearm crossed state or national boundaries
    • The accused allegedly could not lawfully possess a firearm
    • The gun was found during a drug, robbery, conspiracy, or violent crime investigation
    • The case involves suspected trafficking, unlicensed sales, straw purchasing, or smuggling
    • The weapon is a machine gun, silencer, short-barreled rifle, short-barreled shotgun, or destructive device
    • Identifying marks or serial numbers were allegedly removed or changed
    • The alleged offense took place within federal jurisdiction
    • Federal agents connect the firearm to a larger criminal operation

    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.



    How to Protect Yourself During an ATF Investigation in St. Petersburg, FL

    Federal investigations usually develop quietly. If agents have reached out, searched your property, questioned someone close to you, or asked you to “clear a few things up,” assume the case is already moving. You should treat every conversation and decision as part of the defense.

    Protect yourself by doing the following:

    • Do not speak with federal agents without a federal firearms attorney in St. Petersburg, FL. You have the right to remain silent. Even truthful statements can be misunderstood or used against you later.
    • Do not consent to additional searches. If agents have a warrant, do not interfere, but you are not required to give permission for searches beyond the warrant’s scope.
    • Preserve potential evidence. Keep text messages, emails, receipts, firearm purchase records, photographs, and other documents that may help explain what happened. Do not delete or destroy anything.
    • Avoid discussing the investigation with others. Phone calls, text messages, emails, and social media posts can become evidence. Conversations with friends, family members, or potential witnesses may also be scrutinized.
    • Contact a federal criminal defense lawyer in St. Petersburg, FL immediately. Early representation can protect your rights, prevent unnecessary mistakes, and allow your attorney to communicate with investigators on your behalf.


    Types of Federal Gun Charges in St. Petersburg, FL


    Unlawful Firearm Possession Under 18 U.S.C. § 922(g)

    Under 18 U.S.C. § 922(g), several categories of people are prohibited from possessing firearms or ammunition.

    Prohibited persons may include:

    • A prior conviction carrying a possible sentence of more than one year
    • Fugitive status
    • Unlawful use of controlled substances
    • A qualifying domestic violence restraining order
    • A conviction for certain domestic violence offenses
    • Dishonorable discharge or certain immigration statuses

    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.

    The government may try to prove possession in either of two ways:

    • Physical possession: The firearm was allegedly recovered directly from the accused.
    • Constructive possession: The government argues that the accused exercised dominion or control over the firearm even though someone else may have been closer to it.

    A gun found under the same roof is not automatically possessed by everyone inside. When several people use the home, vehicle, room, or container where the weapon was recovered, the government’s control-and-knowledge theory may be open to challenge.

    Possessing a Firearm During a Drug Trafficking Crime or Crime of Violence

    Under 18 U.S.C. § 924(c), the government may pursue an additional charge when a firearm was allegedly used or carried in relation to a drug trafficking crime or crime of violence, or possessed in furtherance of one.

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

    • Five years or more when a firearm was possessed, used, or carried
    • Seven years or more when the weapon was allegedly displayed or brandished
    • Ten years or more when the gun was fired
    • Substantially greater exposure for specially regulated firearms and devices

    The firearm does not have to be fired. Prosecutors may argue that a gun advanced or protected the alleged crime because it was found near:

    • Controlled substances
    • Large amounts of currency
    • Baggies, scales, or packaging supplies
    • Ledgers, customer lists, or distribution records
    • Other items prosecutors associate with drug sales

    A gun near drugs is not automatically a gun possessed “in furtherance” of trafficking. The defense may dispute knowledge, accessibility, ownership, proximity, and whether the firearm had any meaningful relationship to the alleged crime.

    Straw Purchasing a Firearm

    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.

    Questions that may determine whether the transaction was lawful include:

    • 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.

    Federal Firearms Trafficking Charges

    A gun sale does not need to happen in a back alley to draw a federal trafficking charge. Section 933 applies to certain firearm transfers, receipts, and transportation when the accused knew or had reason to believe the weapons would end up in illegal hands.

    Federal agents may characterize firearms as trafficked when they were allegedly:

    • Purchased using another person’s name or eligibility
    • Moved from a state with looser availability into another jurisdiction
    • Sold to alleged gang members, traffickers, or violent offenders
    • Acquired through coordinated straw purchase schemes
    • Bought and flipped without a required dealer’s license
    • Concealed or transported for unlawful export

    When Private Gun Sales Become Federal Charges

    A person regularly buying and selling guns as a business may be required to hold a federal firearms license. Selling a firearm from a personal collection once in a while is not automatically the same thing as operating as a dealer.

    To argue that someone was acting as a dealer, the government may look at:

    • Repeated buying and reselling rather than isolated transfers
    • Short turnaround times between acquisition and sale
    • Advertising guns to members of the public
    • Negotiations, payment histories, and delivery arrangements
    • A business or profit-making purpose
    • A stock of firearms maintained for resale

    Federal Charges for False Firearm Purchase Statements

    A knowingly false answer given during a firearm transaction can lead to federal charges under 18 U.S.C. § 922(a)(6) if the information mattered to whether the dealer could lawfully complete the sale.

    Alleged false statements may involve:

    • Who was actually purchasing the gun
    • Whether the buyer had a disqualifying criminal record
    • Current or recent controlled-substance use
    • Domestic violence convictions or restraining orders
    • Immigration classification or citizenship
    • Where the person lived or whether the identification was accurate

    The government must do more than point to an inaccurate box on a form. The defense may dispute whether the response was truly false, whether the accused understood it was wrong, or whether it made any legal difference to the sale.

    Possessing a Gun With a Removed Serial Number

    Under 27 CFR § 478.34, federal law prohibits knowingly transporting, receiving, or possessing certain firearms with serial numbers that have been removed, altered, or obliterated.

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

    • Knowledge of the damaged serial number
    • The degree and legal significance of the alteration
    • Whether experts can recover the firearm’s identifying information
    • Whether the gun was actually possessed or controlled by the accused

    Even when it is not charged as a separate count, a defaced serial number may be used to push the recommended federal sentence higher.

    Federal Charges Involving Privately Made Firearms

    A privately made firearm is not automatically illegal simply because an individual assembled it. Criminal exposure may arise depending on:

    Federal agents may look at the entire life of the firearm, including:

    • Who assembled and ultimately possessed it
    • The parts, process, and configuration used to make it
    • Whether it remained for personal use or was transferred to someone else
    • Whether multiple weapons were built for sale
    • Whether federal marking requirements applied
    • Whether the firearm appeared in another criminal investigation

    Even where the firearm itself is not prohibited, the absence of a required serial number may increase the recommended guideline sentence.

    NFA Weapons and Registration Offenses

    Certain firearms and devices are subject to stricter federal controls under the National Firearms Act. The law regulates their registration, manufacture, taxation, possession, and transfer.

    NFA-regulated firearms include:

    • Automatic weapons
    • Rifles and shotguns below specified barrel-length requirements
    • Silencers or sound suppressors
    • Destructive devices
    • Modified firearms that meet an NFA definition
    • Other specially classified weapons

    Charges may involve possessing an unregistered weapon, illegally manufacturing or transferring one, or possessing a firearm with required identifying information removed. A conviction can carry up to 10 years in federal prison, fines, and forfeiture.



    Potential Punishment for Federal Weapons Offenses in St. Petersburg, FL

    Two people charged with firearm offenses may face very different outcomes. Federal sentencing depends on what prosecutors can prove, which statute applies, whether the law requires consecutive time, the accused’s criminal history, and how the court calculates the advisory guideline range.

    Type of Federal Firearm Case Maximum or Mandatory Penalty
    Possession by a prohibited person under 18 U.S.C. § 922(g) Generally up to 15 years in federal prison; qualifying Armed Career Criminal Act cases carry a mandatory minimum of 15 years
    A § 924(c) firearm charge tied to drug trafficking or a qualifying violent offense A consecutive mandatory term beginning at five years and increasing based on how the firearm was allegedly used
    Straw purchasing under 18 U.S.C. § 932 Up to 15 years, or up to 25 years when the buyer knows or has reason to believe the firearm will be used to commit certain serious crimes
    Unlawful transportation or transfer of firearms A possible sentence of as much as 15 years
    Dealing firearms without a required federal license Generally a five-year maximum term of imprisonment
    False statements on firearm purchase paperwork Potential imprisonment for up to 10 years
    Receiving, transporting, or possessing a firearm with defaced identifying marks Up to five years in many cases, with further sentencing exposure through an enhancement
    Federal charges involving silencers, short-barreled firearms, machine guns, or other NFA items As much as 10 years of imprisonment along with fines and forfeiture
    Federal machine gun offenses Often up to 10 years, with substantially greater exposure when connected to a drug trafficking crime or crime of violence


    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:

    There is no traditional parole in the federal system. Limited good-time credit may reduce an eligible person’s release date, but most of the sentence pronounced by the judge will still have to be served.

    How the Armed Career Criminal Act Can Increase a Gun Sentence

    For some defendants, the biggest battle is not whether § 922(g) applies, but whether the government can trigger the ACCA. That designation replaces the ordinary sentencing range with a mandatory minimum term of 15 years.

    ACCA may apply to a person convicted under 18 U.S.C. § 922(g) who has three qualifying prior convictions involving violent felonies, serious drug crimes, or some combination of the two, so long as the offenses occurred on different occasions.

    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.

    Defense counsel may attack the enhancement by examining:

    • 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

    The math is unforgiving: the government needs three qualifying predicates. A successful challenge to even one of them may be the difference between an ordinary § 922(g) sentence and at least 15 years in federal prison.

    Federal Guideline Enhancements for Gun Charges

    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:

    • Possessing numerous firearms
    • Guns reported stolen
    • Removed, altered, or unreadable serial numbers
    • Supplying firearms to prohibited individuals or trafficking activity
    • Machine guns, suppressors, destructive devices, or other NFA-regulated weapons
    • Using or possessing a firearm during another felony offense
    • Dangerous conduct while attempting to flee law enforcement
    • Directing or organizing other participants
    • Acts prosecutors characterize as obstruction

    The advisory guideline range is only one part of the sentencing decision, but it carries significant weight. Defense counsel may dispute factual allegations, challenge the legal basis for enhancements, present mitigating information, and advocate for a sentence below the recommended range.

    When Should You Contact a Federal Firearms Defense Lawyer?

    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.

    Common signs that federal authorities may be building a case include:

    • Federal investigators want to speak with you
    • Your property is searched or evidence is seized
    • Someone close to the investigation receives grand jury process
    • Law enforcement takes firearms, records, or digital devices
    • You are identified as the recipient of a target letter
    • Another person in the alleged investigation is charged or arrested
    • Your state case appears to have been put on hold without a clear reason
    • You learn federal prosecutors are evaluating potential charges

    The earlier a defense attorney becomes involved, the more options may exist. Depending on the circumstances, counsel can handle communications with investigators, help avoid unnecessary interviews, identify constitutional issues, preserve evidence, assess the strength of the government’s case, and present mitigating information before prosecutors decide whether to seek an indictment.



    Speak With a Federal Gun Charges Lawyer in St. Petersburg, FL

    Combs Waterkotte defends clients from St. Petersburg, FL 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.

    Strong negotiation starts with being prepared to try the case. We explore resolutions when they protect the client, but we do not treat a plea as the automatic destination.

    Our firm brings decades of combined defense experience, an in-house investigator, and a history of handling severe state and federal allegations. We have the personnel and resources to defend firearm cases at every stage, including investigation, indictment, trial, sentencing, 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 St. Petersburg, FL.

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