Policy / Culture
10 Years
Federal law prohibits all cannabis users from owning firearms under 18 U.S.C. 922(g)(3), and lying about it on ATF Form 4473 is a standalone felony carrying up to 10 years in prison.
United States v. Daniels, Fifth Circuit, 2023
The Federal Law: 18 U.S.C. 922(g)(3)
covered in detail
ATF Form 4473: The Question You Cannot Avoid
covered in detail
Medical Cannabis Cards and the ATF
covered in detail
United States v. Daniels, Fifth Circuit, 2023
View as image ↗This is not legal advice. Firearms law is a complex intersection of federal and state regulations. The consequences of getting this wrong include federal felony charges. Consult an attorney who specializes in firearms law before making decisions that affect your rights.
There is a legal collision that affects millions of Americans, and it receives remarkably little attention given its severity. If you use cannabis legally under state law, federal law says you cannot own a gun. If you own a gun and use cannabis, you are committing a federal crime. And if you buy a gun from a licensed dealer, you will be asked about it directly on a federal form where lying is a standalone felony. This is not a gray area or a technicality. It is black-letter federal law, and it applies to you regardless of what your state has legalized.
Key Takeaways
- Federal law (18 U.S.C. 922(g)(3)) says anyone who uses a controlled substance can't own a gun — and cannabis is still federally controlled, no matter what your state allows
- ATF Form 4473, which you fill out for every gun purchase from a licensed dealer, asks directly about cannabis use — and lying on it is a federal felony with up to 10 years in prison
- Having a medical cannabis card is enough for the ATF to assume you're a current user, which effectively blocks you from legally buying firearms
- Several court challenges are pushing back, and recent rulings have started questioning whether this blanket ban holds up under the Second Amendment
- State cannabis laws don't override the federal firearms prohibition, which creates a direct conflict for millions of Americans who legally use cannabis and legally own guns
- In United States v. Daniels (2023), the Fifth Circuit ruled that taking away someone's gun rights just because they use marijuana is unconstitutional — though that only applies in Texas, Louisiana, and Mississippi until the Supreme Court decides
The Federal Law: 18 U.S.C. 922(g)(3)
Cannabis + Firearms: The Federal-State Collision
Bottom line: If you use cannabis — even legally under state law — federal law says you cannot own, buy, or possess firearms. Penalty: up to 10 years federal prison + $250,000 fine. This affects millions of Americans in legal states.
The Gun Control Act of 1968 established that certain categories of people are prohibited from possessing firearms or ammunition. Section 922(g)(3) specifically prohibits possession by anyone who is "an unlawful user of or addicted to any controlled substance."
Cannabis is a Schedule I controlled substance under the federal Controlled Substances Act. Despite legalization in over 20 states, cannabis use remains "unlawful" under federal law. This means that any current cannabis user is a prohibited person under 18 U.S.C. 922(g)(3), regardless of whether their use is legal under state law.
The term "unlawful user" is not defined with precision in the statute. Federal courts have generally interpreted it to mean someone with a pattern of use recent enough to indicate ongoing or current use, rather than a single past instance. However, the practical threshold is low. Regular use within the past year, or even the possession of a current medical card, has been treated as sufficient evidence of being an unlawful user.
The penalty for violating 922(g)(3) is up to 10 years in federal prison and a fine of up to $250,000. This is not a minor infraction.
ATF Form 4473: The Question You Cannot Avoid
Every firearm purchased from a federally licensed dealer requires the buyer to complete ATF Form 4473, the Firearms Transaction Record. Question 21e on the current form asks:
"Are you an unlawful user of, or addicted to, marijuana or any depressant, stimulant, narcotic drug, or any other controlled substance? Warning: The use or possession of marijuana remains unlawful under Federal law regardless of whether it has been legalized or decriminalized for medicinal or recreational purposes in the state where you reside."
The ATF added the explicit warning about state legalization to ensure that buyers understand the question refers to federal law, not state law. The form leaves no room for misinterpretation.
If you are a current cannabis user and you answer "No" to this question, you are committing a federal felony under 18 U.S.C. 1001 (making a false statement to a federal agency). The penalty for a false statement on Form 4473 is up to 10 years in prison.
If you answer "Yes," the dealer will deny the sale. You will not be able to purchase the firearm.
This creates a genuine trap for the estimated 50 million Americans who use cannabis. To legally purchase a firearm from a dealer, they must either stop using cannabis or lie on a federal form. There is no third option under current law.
Medical Cannabis Cards and the ATF
In 2011, the Bureau of Alcohol, Tobacco, Firearms and Explosives issued an open letter to all federal firearms licensees (gun dealers) stating that if a dealer has "reasonable cause to believe" that a potential buyer is a cannabis user, the sale should be denied. The ATF specifically identified possession of a state-issued medical cannabis card as "reasonable cause to believe" the person is an unlawful user.
This means that in practice, holding a medical cannabis card creates a documented inference that you are a cannabis user, which the ATF treats as disqualifying. Some gun dealers will check public medical cannabis registry databases where available, though most states do not make patient information available to dealers or law enforcement.
The practical impact is significant. A medical cannabis patient who attempts to purchase a firearm faces the same dilemma as any cannabis user: lie on the form or be denied. But the medical card adds a layer of documentation that makes the false statement more provable if it were ever investigated.
In Wilson v. Lynch (2016), the Ninth Circuit Court of Appeals upheld the denial of a firearm sale to a woman who held a medical cannabis card, even though she claimed she did not actually use cannabis and had obtained the card for political reasons. The court held that the ATF's inference of use based on card possession was reasonable.
The Second Amendment Challenge
The constitutional landscape is shifting. The Supreme Court's decision in New York State Rifle and Pistol Association v. Bruen (2022) established that firearm regulations must be consistent with the historical tradition of firearms regulation in America. This new standard has opened the door to challenges against 922(g)(3) as applied to cannabis users.
In United States v. Daniels (2023), the Fifth Circuit Court of Appeals ruled that the government cannot constitutionally strip someone of their Second Amendment rights based solely on marijuana use. The court found that there is no historical analogue for disarming someone based on the use of a substance, noting that the founding era did not disarm people for alcohol use despite its widespread availability and associated risks.
However, this ruling only applies in the Fifth Circuit (Texas, Louisiana, Mississippi). Other circuits have reached different conclusions, and the issue has not yet been definitively resolved by the Supreme Court. A circuit split exists, making Supreme Court review increasingly likely.
Several additional challenges are working through federal courts, and the trend in recent decisions leans toward finding that the blanket prohibition on gun ownership for cannabis users is constitutionally problematic. But "trending toward" is not the same as "resolved," and relying on a legal challenge that has not yet reached the Supreme Court is a significant personal risk.
Concealed Carry and Cannabis
The conflict extends to concealed carry permits. Most states require applicants for concealed carry permits to meet the same federal eligibility requirements for firearm possession. Since cannabis use renders someone a prohibited person under federal law, it technically disqualifies them from holding a concealed carry permit.
In practice, enforcement varies dramatically. Some states check for cannabis use or medical card status during the concealed carry application process. Others do not. Some states have explicitly stated that state-legal cannabis use does not disqualify applicants from state-issued concealed carry permits, even though the federal prohibition technically applies.
This creates a situation where a person might hold a state-issued concealed carry permit and legally purchased firearms under state law while simultaneously being in violation of federal law. The risk of enforcement is low on a day-to-day basis, but any federal investigation, background check for a new purchase, or interaction with federal law enforcement could expose the conflict.
State vs. Federal: The Practical Reality
Despite the clear federal prohibition, enforcement against individual cannabis users who possess firearms is exceedingly rare. Federal prosecutors have limited resources and typically focus on cases involving violent crime, trafficking, or other aggravating factors. The suburban cannabis consumer who also owns a hunting rifle is unlikely to be the target of a federal firearms investigation.
But "unlikely" is not "impossible," and the federal prohibition creates real risks in specific situations.
If you are involved in any incident where police respond to your home and find both cannabis and firearms, the federal issue can be raised even if both are legal under state law. If you are charged with any other federal offense, cannabis and firearms possession can be added as additional charges. If you go through a federal background check for any reason (employment, security clearance, immigration), the combination of cannabis use and firearms ownership creates a documented conflict.
Additionally, if you are ever charged with 922(g)(3), the penalties are severe and the defense options are limited. "I thought it was legal because my state legalized it" is not a defense to a federal charge.
What Happens If You Already Own Guns and Use Cannabis
If you already possess firearms and are a current cannabis user, you are technically in violation of 18 U.S.C. 922(g)(3) right now. This is true regardless of whether you purchased the firearms before you began using cannabis, whether you inherited them, or whether they were gifts.
The prohibited person status applies to possession, not just purchase. A prohibited person cannot legally possess firearms or ammunition. Technically, a current cannabis user should not have firearms in their home, even if they purchased them years ago when they were not a cannabis user.
Practically, this is unenforceable on a broad scale and is almost never prosecuted in isolation. But it is the law, and it becomes relevant when other legal issues arise.
Practical Implications
The decision about how to handle this conflict is deeply personal and depends on your individual risk tolerance, your state's specific legal environment, and how the evolving legal landscape develops.
Some people choose cannabis and do not purchase firearms. Some choose firearms and do not use cannabis. Some continue both and accept the legal risk, operating in a gray area that affects millions of Americans.
What should not be ambiguous is the form. Do not lie on ATF Form 4473. A false statement on a federal form is a standalone felony that is far more prosecutable than simple possession. If you cannot truthfully answer "No" to question 21e, do not attempt the purchase.
The most prudent approach for anyone who values both their Second Amendment rights and their access to legal cannabis is to stay informed about the evolving case law, particularly the circuit court decisions working their way toward the Supreme Court. A definitive Supreme Court ruling could resolve this conflict. Until that happens, the federal prohibition stands, and the personal decision about how to navigate it carries real legal weight.
If you are uncertain about your specific situation, consult an attorney who practices both firearms law and cannabis law. The intersection is narrow, but attorneys who understand both domains exist and can provide guidance tailored to your state and circumstances.
The Bottom Line
Federal firearms-cannabis conflict covering law, case law, and practical implications. Core prohibition: 18 U.S.C. 922(g)(3) — "unlawful user of or addicted to any controlled substance" cannot possess firearms/ammunition; cannabis = Schedule I = unlawful under federal law regardless of state legalization; penalty up to 10yr/$250K fine. ATF Form 4473 Question 21e: explicitly warns state legalization irrelevant; answering "No" while using cannabis = felony false statement (18 U.S.C. 1001, up to 10yr); answering "Yes" = sale denied. Medical cards: 2011 ATF open letter — card = "reasonable cause to believe" user is prohibited person; Wilson v. Lynch (2016) 9th Circuit upheld card-based denial even when holder claimed non-use. Constitutional challenges: NYSRPA v. Bruen (2022) historical tradition standard opened door; US v. Daniels (2023) 5th Circuit — cannot strip 2A rights based solely on marijuana use (applies TX, LA, MS only); circuit split makes SCOTUS review likely. Concealed carry: most states require federal eligibility; some states explicitly don't disqualify state-legal cannabis users but federal prohibition technically applies. Practical reality: individual enforcement exceedingly rare but risk materializes in police responses to home, federal charges, background checks, security clearances. Current possession: 922(g)(3) covers possession not just purchase; cannabis user with inherited/gifted firearms technically in violation. Do not lie on Form 4473 — false statement far more prosecutable than simple possession.
Can you legally own a gun and use cannabis in a legal state?
Under federal law, no. 18 U.S.C. 922(g)(3) prohibits any "unlawful user of or addicted to any controlled substance" from possessing firearms or ammunition. Because cannabis remains a Schedule I substance under the federal Controlled Substances Act, any current cannabis user is a prohibited person regardless of state legalization. State laws permitting cannabis use do not override this federal prohibition. In practice, enforcement against individual cannabis users who possess firearms is exceedingly rare — federal prosecutors typically focus on cases involving violent crime or trafficking. However, the legal risk becomes real in situations involving police responses to your home, federal investigations, background checks, or security clearance applications where both cannabis use and firearms possession become documented.
What is ATF Form 4473 and why does it matter for cannabis users?
ATF Form 4473 is the Firearms Transaction Record required for every firearm purchase from a federally licensed dealer. Question 21e asks directly whether you are an unlawful user of marijuana, with an explicit warning that state legalization is irrelevant under federal law. If you are a current cannabis user and answer "No," you are committing a federal felony (false statement under 18 U.S.C. 1001) punishable by up to 10 years in prison. If you answer "Yes," the dealer will deny the sale. This creates a genuine trap for the estimated 50 million Americans who use cannabis — to legally purchase a firearm from a dealer, they must either stop using cannabis or lie on a federal form. Do not lie on Form 4473. A false statement is a standalone felony that is far more prosecutable than simple possession.
Does having a medical cannabis card prevent you from buying a gun?
Effectively yes. In 2011, the ATF issued an open letter stating that possession of a medical cannabis card constitutes "reasonable cause to believe" the person is an unlawful user, which disqualifies them from firearm purchases. In Wilson v. Lynch (2016), the Ninth Circuit upheld the denial of a firearm sale to a woman holding a medical card, even though she claimed she did not actually use cannabis and had obtained the card for political reasons. The medical card creates documented evidence that makes a false statement on Form 4473 more provable if investigated. Some gun dealers check public medical cannabis registries where available, though most states do not make patient information accessible to dealers.
Has any court ruled that cannabis users can own guns?
Yes. In United States v. Daniels (2023), the Fifth Circuit Court of Appeals ruled that the government cannot constitutionally strip someone of their Second Amendment rights based solely on marijuana use. The court applied the Supreme Court's Bruen standard and found no historical analogue for disarming someone based on substance use, noting that the founding era did not disarm people for alcohol use. However, this ruling only applies in the Fifth Circuit (Texas, Louisiana, Mississippi). Other circuits have reached different conclusions, creating a circuit split that makes Supreme Court review increasingly likely. Until the Supreme Court issues a definitive ruling, the federal prohibition technically stands in most of the country, and relying on an unresolved legal challenge carries significant personal risk.
What happens if police find both cannabis and a firearm during a search?
This is where the federal-state conflict becomes practically dangerous. Even if both cannabis possession and firearm ownership are legal under your state's laws, having both simultaneously puts you in potential violation of 18 U.S.C. 922(g)(3). If you are involved in any incident where police respond to your home and find both, the federal issue can be raised. If you are charged with any other federal offense, cannabis and firearms possession can be added as additional charges. The penalties for violating 922(g)(3) are up to 10 years in federal prison and a $250,000 fine. "I thought it was legal because my state legalized it" is not a defense to a federal charge. This risk is low on a day-to-day basis but becomes very real during any law enforcement interaction.
Can you get a concealed carry permit if you use cannabis?
The federal prohibition technically disqualifies cannabis users from concealed carry permits, since most states require applicants to meet federal firearm eligibility requirements. In practice, enforcement varies dramatically. Some states check for cannabis use or medical card status during the application process, while others do not. Some states have explicitly stated that state-legal cannabis use does not disqualify applicants from state-issued concealed carry permits, even though the federal prohibition applies. This creates situations where a person might hold a valid state-issued concealed carry permit while simultaneously violating federal law. The risk of enforcement is low in daily life but becomes relevant during any federal background check, investigation, or interaction with federal law enforcement.
Sources & References
- 1RTHC-07595·Schmidt, Laura A et al. (2025). “Child Cannabis Poisonings Increased Significantly After California Legalization.” American journal of preventive medicine.Study breakdown →PubMed →↩
- 2RTHC-07597·Schöllner, Natalie S et al. (2025). “Cannabis Use in Germany Increased Dramatically Across Both Time Periods and Birth Cohorts.” Addiction (Abingdon.Study breakdown →PubMed →↩
- 3RTHC-07609·Sedani, Ami E et al. (2025). “Cannabis Co-Use Made Smokers Less Likely to Quit Cigarettes.” Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco.Study breakdown →PubMed →↩
- 4RTHC-07612·Segura, Luis E et al. (2025). “Women's Cannabis Use Increased More Than Men's After Recreational Legalization.” International journal of mental health and addiction.Study breakdown →PubMed →↩
- 5RTHC-08306·Haley, Danielle F et al. (2026). “Recreational Cannabis Laws Linked to 9-11% Drop in Daily Opioid Use Among People Who Inject Drugs.” Drug and alcohol dependence.Study breakdown →PubMed →↩
- 6RTHC-08312·Hammond, Christopher J et al. (2026). “Cannabis Laws Linked to Increased Youth Suicide in Asian/Pacific Islander and Hispanic Populations.” American journal of preventive medicine.Study breakdown →PubMed →↩
- 7RTHC-08327·Hawkins, Summer Sherburne et al. (2026). “Cannabis Legalization Drives New Users Rather Than Heavier Use Among Existing Users.” American journal of preventive medicine.Study breakdown →PubMed →↩
- 8RTHC-08328·Hawkins, Summer Sherburne et al. (2026). “Edible Cannabis Use Surges 35% After Recreational Legalization.” Preventive medicine.Study breakdown →PubMed →↩