Criminal Possession of a Weapon: Charges, Penalties, and Defenses

Criminal possession of a weapon is the offense of having a prohibited item, or having a firearm when the law bars you from doing so. Prosecutors do not have to prove you used the weapon or intended to use it. Federal law punishes illegal firearm possession by a prohibited person with up to 15 years in prison, and every state adds its own possession offenses that range from misdemeanors to serious felonies.

What Prosecutors Have to Prove

Two elements carry the case: control over the weapon, and knowledge of it.

Control comes in two forms. Actual possession means the weapon was physically on you, whether in a pocket, a holster, or a bag you were carrying. Constructive possession applies when the weapon isn’t on your person but you have access to it and know it’s there. A firearm in your glove compartment, under your mattress, or in a storage unit you control all qualify.

Knowledge carries more weight than many people realize. In Rehaif v. United States (2019), the Supreme Court held that federal prosecutors must prove the defendant knew both that they possessed a firearm and that they belonged to a category of people barred from having one.¹ Someone who genuinely didn’t know about a prior conviction’s firearms consequences, or wasn’t aware of a disqualifying mental health commitment, has a real defense.

Who Federal Law Bars from Possessing a Firearm

Under 18 U.S.C. § 922(g), certain people are completely barred from having firearms or ammunition. The violation is a standalone federal crime, even if the weapon is never fired or brandished. The categories are:

Anyone convicted of a crime punishable by more than one year in prison, regardless of the sentence actually served.
Fugitives from justice.
Anyone who uses or is addicted to controlled substances.
Anyone involuntarily committed to a mental institution or found mentally unfit by a court.
Anyone subject to a qualifying domestic violence protective order that includes a finding of credible threat to a partner or child.
Anyone convicted of a misdemeanor crime of domestic violence.
Anyone unlawfully present in the United States or admitted under most nonimmigrant visas.
Anyone discharged from the military under dishonorable conditions.
Former U.S. citizens who have renounced their citizenship.

The domestic violence provisions catch more people off guard than any other category. A misdemeanor assault conviction that doesn’t even use the words “domestic violence” triggers the federal ban if the offense involved physical force and the victim was a spouse, former spouse, cohabitant, or co-parent. There is no exception for law enforcement officers or active-duty military.³ In United States v. Rahimi (2024), the Supreme Court held that the restraining-order bar is constitutional when a court has found the person poses a credible threat to another’s safety.⁴

Weapons No One Can Possess Without Federal Approval

Beyond who can possess a firearm, federal law restricts what anyone can possess without registration.

The National Firearms Act requires registration and a tax payment for machine guns, silencers, short-barreled rifles, short-barreled shotguns, and destructive devices. Possessing any of these without proper registration is a federal crime carrying up to ten years in prison and a $10,000 fine.⁵

Federal law also prohibits any firearm that can’t be detected by standard airport metal detectors and X-ray machines.² The ban was reauthorized through 2031.

One boundary worth naming: under current federal rules, an individual who builds a firearm for personal use is not required to serialize it. A federally licensed dealer who takes possession of an unserialized firearm must mark it with a unique serial number within seven days or before selling it, whichever comes first.⁶ Many states go further and require serialization of all privately made firearms, so the federal rule is not the final word where you live.

What the Penalties Look Like

The base federal penalty for illegal firearm possession by a prohibited person is up to 15 years in prison.⁷ Older resources still list a 10-year ceiling; that changed in 2022.

Within that ceiling, federal sentencing guidelines assign a base offense level that translates into a recommended range based on criminal history. A first-time offender with no aggravating factors starts at offense level 14, which the sentencing table translates to roughly 15 to 21 months. The level climbs with prior convictions: one prior violent felony or serious drug conviction pushes it to level 20, and two or more push it to level 24 or higher.⁸ By level 24 with moderate history, the range is measured in years.

Every state has its own possession laws that operate alongside federal law, and a single incident can produce charges in both systems. At the lowest level, possessing certain restricted items (specific knives, brass knuckles, electronic stun devices) is often a misdemeanor with up to a year in jail and fines typically under $1,000. Some states prohibit these items outright while others allow them with restrictions, so an item that’s legal where you live could be illegal one state over.

Firearm-related possession offenses sit higher. Carrying a loaded firearm in public without a valid permit, possessing a firearm with a defaced serial number, or having a firearm as a convicted felon are felonies in most states, with prison terms commonly ranging from two to fifteen years. The most serious state charges are reserved for possession with intent to use against others, or stockpiling large quantities of weapons or explosives, with some states imposing maximums of 25 years. Many states also impose mandatory minimums for particular possession offenses, and those minimums vary too much across jurisdictions to summarize honestly without knowing which state’s law applies.

When Mandatory Minimums Take Over

Some scenarios carry prison terms judges cannot go beneath. These are the situations where plea negotiations matter most, because once the conviction lands, discretion is gone.

The Armed Career Criminal Act

If you’re convicted under § 922(g) and have three or more prior convictions for violent felonies or serious drug offenses committed on separate occasions, the Armed Career Criminal Act imposes a mandatory minimum of 15 years in federal prison.⁷ The court cannot suspend the sentence or grant probation. There is no time limit on how old the priors can be, and convictions that resulted in concurrent sentences still count separately if they arose from different incidents.

A Firearm During a Drug or Violent Crime

Under 18 U.S.C. § 924(c), possessing a firearm during a drug trafficking crime or a crime of violence adds a consecutive term on top of whatever the underlying offense carries:

Possessing a firearm: at least 5 additional years.
Brandishing a firearm: at least 7 additional years.
Discharging a firearm: at least 10 additional years.
Possessing a short-barreled weapon or semiautomatic assault weapon: at least 10 additional years.
Possessing a machine gun, destructive device, or silencer: at least 30 additional years.

These sentences run consecutively, meaning they stack on top of the drug or violence sentence rather than at the same time. A second § 924(c) conviction carries a 25-year mandatory minimum, and if a machine gun or silencer is involved on the second offense, the sentence is life.⁷

Gun-Free School Zones

Federal law makes it a crime to knowingly possess a firearm in a school zone, defined as the grounds of any public or private school and the area within 1,000 feet.² Exceptions cover people with state-issued carry permits, unloaded firearms stored in locked containers, and firearms used in school-approved programs. Most states have adopted similar or stricter rules covering government buildings, courthouses, and other public facilities.

Defenses Worth Knowing About

Possession charges are defensible. The strategy depends on the facts of the arrest.

Illegal Search and Seizure

The Fourth Amendment prohibits unreasonable searches, and any weapon discovered during an unconstitutional search can be excluded from evidence. If police searched your car, home, or person without a warrant and without a recognized exception, the weapon itself becomes inadmissible, and without the physical evidence the case often collapses. The recognized exceptions are narrow: you consented, the search happened during a lawful arrest, an emergency justified immediate action, or the weapon was in plain view.

Lack of Knowledge

After Rehaif, federal prosecutors must prove the defendant knew they fell into a prohibited category.¹ The defense works best when prohibited status stems from something the defendant could plausibly have missed, such as the immigration consequences of a guilty plea or a mental health adjudication they were never informed about. It does not work when someone knows full well they’re a convicted felon and gets caught with a gun in their waistband.

Temporary or Innocent Possession

Most jurisdictions recognize a defense for someone who briefly held a weapon for a lawful reason. The classic scenario is taking a gun from someone threatening harm and holding it until police arrive. You must have come into possession innocently, not used the weapon recklessly, and disposed of it as quickly as reasonably possible. Keeping the weapon “just in case” doesn’t qualify, even if you took it from an assailant moments earlier.

Second Amendment Challenges

The Supreme Court’s 2022 decision in New York State Rifle & Pistol Association v. Bruen changed the framework courts use to evaluate firearms regulations. Any regulation must now be “consistent with this Nation’s historical tradition of firearm regulation” to survive challenge. The Court was explicit, however, that Bruen does not disturb longstanding prohibitions on possession by felons or people with serious mental illness, or laws barring firearms in sensitive places like schools and government buildings.⁹ For most people facing a standard possession charge as a prohibited person, Bruen is not a viable defense.

Consequences Beyond the Sentence

A weapon possession conviction produces problems that outlast prison, and many people don’t learn about them until it’s too late to avoid them.

Supervised Release

Federal weapon convictions almost always include supervised release after prison. For Class A or B felonies, supervised release can last up to five years; for Class C or D felonies, up to three. Conditions include drug testing, travel restrictions, and a ban on possessing firearms. Violate the firearms condition and the court must revoke your release and send you back to prison, with no discretion on that point.¹⁰

Immigration

For non-citizens, a weapon conviction can be catastrophic. Federal immigration law treats firearm offenses as a specific ground for deportation, and certain convictions qualify as “aggravated felonies” that bar virtually every form of relief from removal. A firearm conviction also disqualifies someone from DACA eligibility or renewal. Even for someone not facing deportation, a firearm conviction can block naturalization and create inadmissibility problems that surface years later.

Employment, Housing, and Voting

A felony weapon conviction appears on background checks. Many employers in regulated industries cannot hire someone with a felony weapons conviction, and licensing boards in healthcare, finance, and education routinely deny applications based on weapon-related felonies. Federal housing programs allow denial based on criminal history, and private landlords screen for felony records as standard practice. Most states suspend voting rights during incarceration, and some extend that suspension through probation or parole.

Costs

Defending a felony weapon possession charge typically costs between $3,000 and $70,000 in attorney fees at the state level, depending on complexity and jurisdiction. Fines can reach tens of thousands more for serious felony counts. Add court fees, restitution, lost wages during incarceration, and the long-term earning reduction from a felony record, and the total often runs well into six figures.

Getting Firearm Rights Back

Federal law provides a path to restore firearm rights through 18 U.S.C. § 925(c), which authorizes the Attorney General to grant relief from federal firearms disabilities.¹¹

State restoration varies. Some states automatically restore firearm rights once you complete your full sentence including probation and parole. Others require a formal petition and a court hearing. Expungement or sealing of the underlying conviction is another potential route, though not all weapon convictions qualify. Attempting to possess a firearm before your rights are formally restored is itself a federal crime under § 922(g), so getting the timing wrong creates an entirely new felony.² Confirm your status in writing before you touch a firearm.

1
Supreme Court of the United States. Rehaif v. United States
2
Office of the Law Revision Counsel. United States Code Title 18 Section 922 – Unlawful Acts
3
U.S. Department of Justice. Restrictions on the Possession of Firearms by Individuals Convicted of a Misdemeanor Crime of Domestic Violence
4
Supreme Court of the United States. United States v. Rahimi
5
Office of the Law Revision Counsel. United States Code Title 26 Section 5871 – Penalties
6
Bureau of Alcohol, Tobacco, Firearms and Explosives. Privately Made Firearms
7
Office of the Law Revision Counsel. United States Code Title 18 Section 924 – Penalties
8
United States Sentencing Commission. USSG 2K2.1 – Unlawful Receipt, Possession, or Transportation of Firearms or Ammunition
9
Supreme Court of the United States. New York State Rifle and Pistol Association Inc. v. Bruen
10
Office of the Law Revision Counsel. United States Code Title 18 Section 3583 – Inclusion of a Term of Supervised Release After Imprisonment
11
Office of the Law Revision Counsel. United States Code Title 18 Section 925 – Exceptions: Relief From Disabilities