When federal prosecutors add a gun charge in San Diego, CA, 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 San Diego, CA, Combs Waterkotte is prepared to push back. Our federal criminal defense team serving San Diego, CA 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?
Maybe agents have already searched your property. Maybe someone close to you has been questioned. Maybe a target letter just landed in your hands. Whatever tipped you off, do not ignore it. Reach out to Combs Waterkotte or call (314) 900-HELP before speaking with investigators or making a move that cannot be undone.
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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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What Makes a Gun Charge 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.
Federal jurisdiction may arise when:
- A prohibited person allegedly possessed a gun or ammunition
- The weapon allegedly traveled in or affected interstate or foreign commerce
- The firearm was supposedly used, carried, or kept in connection with another federal crime
- The investigation concerns illegal sales, straw buyers, trafficking networks, or cross-border smuggling
- The gun falls into a specially regulated category under federal law
- Authorities discover a defaced or missing serial number
- The incident happened on federal property or during another federal investigation
- The government believes the weapon played a role in organized criminal activity
These investigations often run quietly in the background. By the time agents knock, call, or execute a warrant, they may have spent months reviewing phones, social media accounts, purchase records, surveillance, witness statements, and forensic testing.
What Should You Do If You’re Under Investigation for a Federal Gun Crime in San Diego, CA?
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 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 San Diego, CA, 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.
Types of Federal Gun Charges in San Diego, CA
Possession of a Firearm by a Prohibited Person
A person may face a federal gun charge based on their legal status rather than how the firearm was allegedly used. Under 18 U.S.C. § 922(g), firearm and ammunition possession is prohibited for several categories of restricted persons.
The federal prohibition may apply to:
- 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
Prosecutors generally must establish that the accused knowingly possessed the firearm or ammunition and knew of the status that made possession unlawful.
Federal firearm possession is commonly divided into two categories:
- Direct or actual possession: Agents or officers claim the weapon was in the person’s hand, pocket, waistband, bag, or immediate physical custody.
- Constructive possession: Prosecutors claim the person was not holding the gun but knew it was present and could control what happened to it.
Constructive possession is often disputed when a gun is found in a shared home, borrowed vehicle, hotel room, or another location used by several people.
Firearm Charges Connected to Drug Trafficking or Violent Crime
18 U.S.C. § 924(c) makes it a separate federal offense to use or carry a firearm during and in relation to a qualifying crime of violence or drug trafficking crime, or to possess one in furtherance of such a crime.
The mandatory minimum sentence generally must be served consecutively to the sentence for the underlying offense:
- 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 prosecution may describe a firearm as a tool of the alleged offense even when it stayed hidden or untouched. That argument commonly relies on its location near:
- Illegal drugs
- Cash
- Packaging materials
- Distribution records
- Other alleged evidence of trafficking
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.
The government and defense may focus 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.
Illegal Gun Trafficking
Under 18 U.S.C. § 933, federal prosecutors may pursue trafficking charges when they believe someone knowingly moved, received, or transferred firearms headed for unlawful possession or use.
Federal agents may characterize firearms as trafficked when they were allegedly:
- 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
Dealing Firearms Without a Federal License
An individual may lawfully make some private firearm sales without becoming a licensed dealer. Problems arise when federal agents believe the person crossed from disposing of personal property into running a gun business without the required federal firearms license.
The case may turn on the overall pattern of activity, including:
- 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
Lying on a Federal Firearm Purchase Form
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.
Federal investigators may focus on statements about:
- Whether the person completing the form was the real buyer
- The existence or nature of a prior conviction
- Illegal drug use or controlled-substance status
- A qualifying domestic violence case or protection order
- Citizenship, immigration, or residency status
- The buyer’s address, identity, or supporting documents
A discrepancy is not the end of the story. Defense counsel may argue that the accused misunderstood the question, relied on incorrect information, did not knowingly lie, or gave an answer that did not affect whether the firearm could be sold.
Federal Charges Involving an Altered Firearm 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.
Important questions may 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
An altered serial number may also increase the recommended sentence under the federal sentencing guidelines.
Privately Made Firearms and “Ghost Guns”
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.
Criminal exposure may arise depending 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
Unserialized firearms may bring an additional sentencing problem, particularly when the federal guidelines call for an enhancement.
National Firearms Act Violations
A firearm that is lawful in one configuration can fall under much stricter rules after certain modifications. The National Firearms Act governs several categories of weapons and devices through registration, taxation, transfer, and manufacturing requirements.
Weapons and devices commonly regulated by the NFA include:
- Machine guns
- Shortened rifles
- Shortened shotguns
- Suppressors, including devices commonly called silencers
- Certain bombs, explosives, and destructive devices
- Unusual or concealed 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.
Penalties for Federal Gun Charges in San Diego, CA
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 | Potential Penalty |
|---|---|
| Possessing a gun or ammunition while federally prohibited | Generally up to 15 years in federal prison; qualifying Armed Career Criminal Act cases carry a mandatory minimum of 15 years |
| Using, carrying, or possessing a gun in furtherance of another federal crime | At least five years, increased to seven for brandishing or 10 for discharge; the sentence usually runs after the underlying sentence |
| Federal straw purchase allegations | As much as 15 years, with enhanced exposure of up to 25 years in qualifying aggravated cases |
| Unlawful transportation or transfer of firearms | Up to 15 years in federal prison |
| Selling guns as a business without an FFL | Generally a five-year maximum term of imprisonment |
| Knowingly providing material false information to a licensed firearm dealer | Potential imprisonment for up to 10 years |
| Possessing a firearm with an altered or obliterated serial number under § 922(k) | 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 | Potentially a decade in federal custody, plus monetary penalties and seizure of the firearm |
| Federal machine gun offenses | 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:
- Fines and court-ordered financial obligations
- Post-release supervision with strict federal conditions
- Forfeiture of the firearm and other property allegedly connected to the offense
- The loss of federal firearm rights
- Difficulty finding employment, securing housing, or keeping a professional license
- Serious immigration consequences, including possible deportation exposure
A federal sentence is not typically cut short through parole. Although some prisoners can earn good-conduct credit, federal incarceration generally means serving the great majority of the term imposed.
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.
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.
A San Diego, CA federal firearms attorney may dispute:
- Whether the prior offense meets the federal definition
- Whether the conviction records establish the required elements
- Whether multiple offenses occurred on different occasions
- Whether a conviction was vacated, expunged, or otherwise invalid
- Whether the accused’s civil rights had been restored
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
A firearm case can carry substantial sentencing exposure even without a mandatory minimum. The United States Sentencing Guidelines may recommend a much higher prison range based on specific offense characteristics.
Guideline enhancements may be tied to claims involving:
- 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 to Call a Federal Gun Defense Attorney
If ATF agents or federal prosecutors are looking at your case, early legal representation can matter. You do not have to wait until you are arrested, indicted, or standing in court before contacting an attorney.
You should take the situation seriously if:
- 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
Early representation may allow a federal crimes attorney in San Diego, CA to communicate with investigators, prevent an unprotected interview, preserve evidence, challenge a search, evaluate possible exposure, and present information before prosecutors make charging decisions.
Call Combs Waterkotte About Your Federal Gun Case
Combs Waterkotte defends clients from San Diego, CA 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.
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.
When negotiations make sense, we negotiate from a position of strength. When they don’t, we are prepared to take your case to 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 you are under investigation or have been charged with a federal gun offense, don’t wait to protect your rights. Contact us online or call (314) 900-HELP today to discuss your case with an experienced San Diego, CA federal gun charges lawyer.
