No. If you have a Michigan medical marijuana card, you cannot legally buy a gun from a licensed dealer, and you cannot legally possess one you already own. Michigan permits medical and recreational cannabis, but marijuana is still a Schedule I controlled substance under federal law, and the federal Gun Control Act bars any “unlawful user” of a controlled substance from buying, receiving, or possessing a firearm. A state-issued medical card puts you squarely in that prohibited category.
Why Federal Law Blocks the Purchase
The controlling statute is 18 U.S.C. § 922(g)(3), which makes it illegal for any “unlawful user of or addicted to any controlled substance” to possess, receive, ship, or transport a firearm or ammunition.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Marijuana is a Schedule I drug under the federal Controlled Substances Act,2Drug Enforcement Administration. Drug Scheduling and no federal law authorizes medical use, so any marijuana use is “unlawful” for purposes of this statute regardless of Michigan’s rules. The ATF’s guidance on prohibited persons treats unlawful controlled-substance users as one of the categories that cannot legally have firearms.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Identify Prohibited Persons
In 2011, the ATF sent an open letter to every Federal Firearms Licensee in the country addressing this precise conflict. It stated that a person who uses marijuana “regardless of whether his or her State has passed legislation authorizing marijuana use for medicinal purposes” is a prohibited person under federal law.4Bureau of Alcohol, Tobacco, Firearms and Explosives. Open Letter to All Federal Firearms Licensees The letter instructed dealers that if they know or have “reasonable cause to believe” a buyer uses marijuana, they must refuse the sale. Knowing a customer holds a state medical marijuana card qualifies as reasonable cause.
The Form 4473 Trap
Every firearm purchase from a licensed dealer requires ATF Form 4473, a sworn document certifying your eligibility. One question asks directly whether you are an unlawful user of, or addicted to, marijuana or any other controlled substance. A bolded warning on the form notes that marijuana use remains unlawful under federal law regardless of whether your state has legalized or decriminalized it.
That leaves a cardholder with two bad options. Answer “yes” and the sale stops immediately. Answer “no” while holding an active medical card or using marijuana, and you have just made a false statement on a federal form. There is no third box that lets you explain the state-legal nuance.
The Ban Covers Guns You Already Own
Most people focus on new purchases, but § 922(g)(3) also prohibits possession of any firearm or ammunition.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts If you owned firearms before getting a medical card and keep them after you start using cannabis, you are technically violating federal law every day those guns remain in your home. There is no statutory grace period and no administrative process for becoming a prohibited person. The moment you become an unlawful user, the prohibition attaches.
Living in a home with someone else’s firearms creates its own exposure. Federal courts recognize constructive possession: if you know a gun is present and can access it, you can be treated as possessing it. For a cardholder sharing a home with a gun-owning spouse, roommate, or family member, an unlocked firearm in a shared space could support a federal charge. The practical response is to keep any household firearms locked in a safe you cannot open, stored at another location, or transferred to someone outside the home.
Private Sales Do Not Fix It
Skipping the dealer does not skip the law. Section 922(g)(3) applies to receiving or possessing firearms through any channel — private seller, family member, gun show, or licensed dealer. Form 4473 is just the enforcement mechanism at retail; the underlying ban is independent of it. Section 922(d)(3) also makes it a federal crime for any person to sell or give a firearm to someone they know or have reasonable cause to believe is a prohibited user.5Office of the Law Revision Counsel. 18 US Code 922 – Unlawful Acts A private seller who knows about your medical card and sells to you anyway is also committing a federal offense.
A Michigan CPL Doesn’t Override Federal Law
Michigan’s list of disqualifiers for a Concealed Pistol License does not include marijuana use or possession of a medical card.6Michigan Legislature. Michigan Compiled Laws 28.425b So under state law alone, a cardholder can be eligible for a CPL. That approval can feel like a green light, but it is not one. You remain a prohibited person under § 922(g)(3) regardless of what Michigan issues you.
There is a further wrinkle. The ATF’s Brady Permit Chart lists Michigan’s CPL as a qualifying alternative to the NICS background check at the point of sale.7Bureau of Alcohol, Tobacco, Firearms and Explosives. Brady Permit Chart A dealer may skip the federal background check and rely on the CPL. That can let a purchase go through at the counter — but the buyer is still violating federal law by possessing the firearm afterward. Getting the gun home is not the same as owning it legally.
Penalties for Lying on the Form
Making a false statement on Form 4473 to acquire a firearm is a federal felony. Under 18 U.S.C. § 924(a), the maximum penalty is up to 10 years in federal prison plus substantial fines, and federal prosecutors have said they are aggressively pursuing false-statement cases tied to firearm transactions.8Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Prosecutors Aggressively Pursuing Those Who Lie in Connection With Firearm Transactions
For a Michigan cardholder, the evidence trail is built in. Your name sits on the state registry of medical marijuana patients. If federal investigators connect that record to a firearm purchase where you answered “no” to the controlled-substance question, the false-statement case is straightforward. A separate charge for illegal possession under § 922(g)(3) can stack on top of it.
Recent Court Rulings Don’t Change Michigan’s Answer
The constitutional ground under § 922(g)(3) has begun to shift. In 2025, the Fifth Circuit ruled in United States v. Daniels that the statute was unconstitutional as applied to a marijuana user who was not intoxicated at the time he possessed a firearm. The court found historical support for disarming actively intoxicated people, but not for stripping gun rights based on “habitual or occasional” drug use alone.
That decision does not help Michigan residents. The Fifth Circuit covers Texas, Louisiana, and Mississippi. Michigan sits in the Sixth Circuit, which has issued no comparable ruling. Until the Sixth Circuit or the Supreme Court addresses the question, Daniels is not a defense here.
Would Federal Rescheduling Solve It?
Since 2024, the DEA has been working through rulemaking to move marijuana from Schedule I to Schedule III. As of early 2026, that process has stalled amid procedural delays and an unresolved interlocutory appeal, and a December 2025 executive order directed the Attorney General to expedite it. No final rule has issued.
Even if rescheduling happens, it likely will not restore gun rights on its own. The Congressional Research Service has concluded that moving marijuana to Schedule III, without additional legislative changes, “would not bring the state-legal medical or recreational marijuana industry into compliance with federal controlled substances law.”9Congress.gov. Legal Consequences of Rescheduling Marijuana Schedule III drugs still require a federal prescription, and no federal prescription framework exists for marijuana. Cardholders would likely remain unlawful users for firearm purposes unless Congress creates a lawful pathway or amends the Gun Control Act.
What Happens If You Give Up Your Card
If you stop using marijuana and let your card expire, you are no longer an active user and should eventually fall outside the prohibited category. Federal law does not define a specific waiting period, though. Courts have generally read “unlawful user” to mean current or recent use rather than distant past use, but the line between “recent” and “former” is vague.
There is no formal reinstatement process. You do not file paperwork with the ATF or receive a clearance letter. The safer approach is to let enough time pass after your last use that no reasonable person could describe you as a current user, and to make sure your card has expired and is no longer on the active registry. How much time that takes is a judgment call worth running past a lawyer who handles firearms law. Answering “no” on Form 4473 while your card is still active, or your last use was recent, remains high risk.
Recreational Users Are Not in the Clear
Michigan legalized recreational marijuana in 2018, and many residents use cannabis without ever getting a medical card. Section 922(g)(3) does not distinguish between medical and recreational use, or between cardholders and non-cardholders. Any use of a federally controlled substance makes you a prohibited person,3Bureau of Alcohol, Tobacco, Firearms and Explosives. Identify Prohibited Persons and the Form 4473 warning explicitly covers marijuana that has been legalized or decriminalized in your state. The practical difference is only visibility: a recreational user has no state registry entry tying them to marijuana use, which makes detection harder at the point of sale. Harder to detect is not the same as legal. If the use surfaces during any law enforcement encounter, the federal consequences are identical.