When federal prosecutors add a gun charge in St. Louis, MO, 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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When federal agents and prosecutors set their sights on someone in St. Louis, MO, Combs Waterkotte is prepared to push back. Our federal criminal defense team serving St. Louis, MO looks beyond the fact that a gun was found and asks the questions that can change a case: Who knew it was there? Who could control it? Was the search lawful? Can the government actually connect it to the alleged crime?
Federal cases often take shape quietly, long before charges appear on a docket. If you have been arrested, contacted by ATF, warned that you are under investigation, or received a target letter, call (314) 900-HELP or contact our firm online. The earlier the defense gets involved, the more room there may be to influence what comes next.
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Facing Federal Criminal Charges? Why They’re Different and How to Win
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This guide addresses:
- What makes a gun charge a federal offense
- What to do if you’re under federal investigation
- Common federal firearm charges
- Mandatory minimums and sentencing enhancements
- The Armed Career Criminal Act
- When to hire a federal gun charges lawyer
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Why Are Some Gun Charges Prosecuted Federally?
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.
Federal prosecutors may become involved if:
- 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 Should You Do If You’re Under Investigation for a Federal Gun Crime in St. Louis, MO?
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.
Protect yourself by doing the following:
- Exercise your right to remain silent. You do not need to answer questions from ATF agents, task force officers, or federal prosecutors without a federal firearms attorney in St. Louis, MO present. What feels like harmless background information can become evidence.
- Do not give blanket consent. If law enforcement has a valid warrant, let your lawyer challenge it later. Do not voluntarily open additional devices, accounts, rooms, safes, or vehicles unless counsel advises you to do so.
- Do not erase the paper trail. Keep purchase forms, receipts, emails, photographs, texts, and other records intact. Destroying or altering evidence can make the situation far worse.
- Say less to everyone else, too. Friends, relatives, coworkers, and alleged associates can be interviewed or subpoenaed. Social media posts and private messages are not safe places to explain the case.
- Contact a federal criminal defense lawyer in St. Louis, MO immediately. The earlier your attorney enters the case, the sooner they can protect your rights, identify weak points in the investigation, and keep you from stepping into traps the government has already set.
Federal Firearm Offenses Charged in St. Louis, MO
Federal Prohibited-Person Firearm Charges
Federal law does not limit unlawful-possession charges to people with felony convictions. 18 U.S.C. § 922(g) identifies several groups of people who may not legally possess a firearm or ammunition.
People who may fall under § 922(g) include:
- A criminal record involving an offense punishable by more than one year
- An active fugitive status
- Alleged unlawful controlled-substance use
- Certain restraining orders involving an intimate partner or child
- A qualifying domestic violence conviction
- Particular immigration classifications or a dishonorable military discharge
The prosecution must generally connect two pieces of the puzzle: the accused knowingly possessed the gun or ammunition, and they knew about the legal status that made that possession prohibited.
Possession may be:
- Actual possession: The firearm was allegedly found directly on the person.
- Constructive possession: The person allegedly knew the firearm was present and had the ability and intention to control 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
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.
Because these penalties are typically consecutive, the firearm count can add the following time after the sentence for the underlying crime:
- At least five years for possessing, using, or carrying a firearm
- At least seven years if the firearm was brandished
- At least 10 years if the firearm was discharged
- Higher minimums when machine guns, silencers, or destructive devices are involved
No shot needs to be fired for prosecutors to bring this charge. They may claim the firearm helped secure, protect, or advance the alleged operation because it was located close to:
- Drugs or suspected drugs
- Cash allegedly connected to sales
- Scales, containers, or packaging materials
- Phones, notebooks, or transaction records
- Additional evidence of an alleged trafficking operation
The defense may challenge whether the accused knew about the firearm, could access it, or possessed it for any reason connected to the alleged offense.
Buying a Firearm for Another Person
Federal prosecutors may allege a straw purchase when the person completing the transaction is accused of buying the gun on behalf of someone else. The case may involve the “actual transferee/buyer” question on ATF Form 4473, along with charges under 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
These cases leave a digital and documentary trail. Prosecutors may rely on Form 4473, receipts, cash transfers, text conversations, security footage, firearm tracing records, and interview statements to argue who the real buyer was.
Transporting or Transferring Firearms Unlawfully
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
Selling Guns Without a Federal Firearms License
Federal law generally requires a person who is engaged in the business of dealing firearms to obtain a federal firearms license. An occasional private sale does not automatically make someone a firearms dealer.
There is no single fact that settles the issue. Investigators may review:
- 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:
- 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 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.
Possession of a Firearm With an Altered or Obliterated Serial Number
When agents recover a firearm with a filed-down, scratched-off, or otherwise changed serial number, they may add another federal charge. Federal regulations prohibit certain conduct involving those firearms when the accused knew of the alteration.
The case may depend on questions such as:
- Whether the accused knew the serial number had been altered
- Whether the markings meet the statutory definition
- Whether forensic testing can recover the original number
- Whether the government can connect the accused to the firearm
The alleged alteration can affect more than guilt or innocence. It may also support an enhancement when the sentencing guidelines are calculated.
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.
Federal National Firearms Act Charges
The NFA creates a separate federal framework for weapons lawmakers placed under heightened regulation. Compliance may involve registration, tax payments, transfer approval, and manufacturing rules.
The Act covers categories such as:
- 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
An NFA prosecution may be based on alleged possession of an unregistered weapon, unlawful manufacture or transfer, or missing required identifying information. Depending on the charge, a conviction may expose the accused to as much as 10 years in federal prison, financial penalties, and firearm forfeiture.
How Much Prison Time Can a Federal Gun Charge Carry?
The statute provides only part of the sentencing picture. A person’s record, the characteristics of the weapon, the presence of drugs or violence, mandatory minimum laws, and the United States Sentencing Guidelines can all move the potential punishment higher or lower.
| Type of Federal Firearm Case | Possible Federal Sentence |
|---|---|
| Felon in possession or another prohibited-person offense | A possible 15-year maximum, unless qualifying prior convictions trigger the Armed Career Criminal Act’s mandatory minimum |
| Firearm possession or use connected to a drug trafficking crime or crime of violence | A consecutive mandatory term beginning at five years and increasing based on how the firearm was allegedly used |
| Misrepresenting the true buyer of a firearm | 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 |
| Federal gun trafficking under § 933 | A possible sentence of as much as 15 years |
| Dealing firearms without a required federal license | Typically punishable by up to five years |
| Lying about material information during a federally regulated gun sale | Up to 10 years in federal prison |
| Federal charges involving an altered firearm serial number | Typically punishable by as much as five years, and the serial-number issue may also raise the guideline range |
| National Firearms Act violations | Potentially a decade in federal custody, plus monetary penalties and seizure of the firearm |
| Unlawful possession, receipt, or transfer of a machine gun | Up to a decade in many cases, before accounting for mandatory consecutive time or other charges tied to the weapon |
A statutory maximum does not tell you exactly what sentence the court will impose. Federal judges also consider the offense conduct, firearm characteristics, criminal history, mandatory sentencing laws, and the advisory range produced by the United States Sentencing Guidelines.
Even after the prison term is calculated, the court may impose or trigger:
- Substantial fines
- Supervised release after imprisonment
- Forfeiture of firearms, ammunition, money, vehicles, or other property
- Loss of firearm rights
- Restrictions on employment, housing, and professional licensing
- Immigration consequences for noncitizens
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.
How the Armed Career Criminal Act Can Increase a Gun Sentence
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 government generally must identify at least three qualifying prior convictions for violent felonies or serious drug offenses. It must also show that those offenses were committed on occasions separate from one another.
ACCA litigation can become highly technical. The court may compare the wording of the prior state statute to the federal definition, review charging papers or plea records, and determine which version of the law controls. A state-law label is not necessarily the final word.
Potential ACCA challenges include:
- Whether the earlier conviction legally qualifies as a violent felony or serious drug offense
- Whether the permitted court records prove the necessary version of the offense
- Whether the prior crimes were truly committed on separate occasions
- Whether any conviction was overturned, set aside, expunged, or invalidated
- Whether firearm rights or other civil rights were restored
Because the ACCA creates a mandatory minimum sentence, resolving even one disputed prior conviction can make an enormous difference.
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.
Federal prosecutors may seek sentencing increases based on allegations 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
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 to Call a Federal Gun Defense Attorney
You should contact a federal defense lawyer in St. Louis, MO as soon as you believe an investigation may involve you. You do not need to wait for an arrest or indictment.
You should take the situation seriously if:
- ATF, FBI, DEA, or task force agents attempt to question you
- Agents execute a search warrant at your home or business
- Someone close to you receives a subpoena
- Law enforcement seizes firearms, phones, computers, or records
- You receive a federal target letter
- A codefendant or alleged associate is arrested
- A state firearm case is dismissed or delayed without explanation
- You learn that federal prosecutors are reviewing your case
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.
Speak With a Federal Gun Charges Lawyer in St. Louis, MO
Federal firearm cases move quickly and carry enormous consequences. Combs Waterkotte represents people in St. Louis, MO and nationwide, drawing on the insight of former prosecutors who understand federal investigations, charging decisions, and courtroom strategy.
Every case is prepared with the possibility of trial in mind. We examine the government’s evidence piece by piece, challenge illegal searches, test the reliability of witnesses, and oppose sentencing enhancements that the facts or law do not support.
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.
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. Louis, MO.
