No. If you hold a Michigan medical marijuana card, federal law bars you from buying a gun from a licensed dealer, and it bars you from possessing firearms you already own. Michigan has legalized cannabis for medical and recreational use, but marijuana is still a Schedule I controlled substance under federal law, and the federal Gun Control Act treats any marijuana user as a prohibited person. The state card doesn’t change that; in some ways it makes the problem worse, because it puts your name on a registry that documents your status.
Why the Federal Ban Applies
The controlling statute is 18 U.S.C. § 922(g)(3), which makes it a federal crime for anyone who is an “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 classified as Schedule I under the federal Controlled Substances Act, in the same tier as heroin and LSD.2Drug Enforcement Administration. Drug Scheduling Because no federal law authorizes medical marijuana, use of it is “unlawful” at the federal level no matter what Michigan permits. The ATF’s own guidance on prohibited persons says so plainly: an unlawful user of any controlled substance cannot legally have firearms.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Identify Prohibited Persons
In 2011, the ATF told every federally licensed firearms dealer in the country that this rule applies “regardless of whether his or her State has passed legislation authorizing marijuana use for medicinal purposes.”4Bureau of Alcohol, Tobacco, Firearms and Explosives. Open Letter to All Federal Firearms Licensees Dealers were further instructed that if they know or have “reasonable cause to believe” a buyer uses marijuana, they must refuse the sale. Knowing you hold a state medical card qualifies as reasonable cause.
What Happens at the Gun Store
Every purchase from a licensed dealer requires ATF Form 4473, a sworn federal document. 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 states that marijuana use is unlawful under federal law regardless of whether your state has legalized or decriminalized it.
That puts a cardholder in a box with no good exit. Answer “yes” and the dealer stops the sale. Answer “no” while holding an active card or actively using marijuana, and you’ve made a false statement on a federal form. There’s no checkbox for medical use, no explanation space, no middle ground.
Guns You Already Own
The prohibition isn’t limited to new purchases. Section 922(g)(3) also bars possession.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts If you owned firearms before getting your medical card and kept them after you started using marijuana, you are technically violating federal law for as long as those guns are in your possession. There is no grace period written into the statute and no formal process for becoming a prohibited person; the status attaches the moment you qualify as an unlawful user.
For someone with an existing collection, the practical implication is that firearms need to leave your control before you begin using medical marijuana. That usually means transferring them to someone else or storing them where you cannot access them.
Guns Belonging to Someone Else in Your Home
Living with a gun owner creates exposure too. Federal courts recognize constructive possession, which means you can be treated as possessing a firearm if you know it is there and have the ability to access it. For a cardholder sharing a home with a gun-owning spouse, roommate, or family member, an unlocked firearm in a shared space can support a federal possession charge.
The workable approach is to make sure any firearms in the household are secured so you genuinely cannot get to them: locked in a safe you don’t have the combination to, stored elsewhere, or transferred out. The statute draws no line between a gun in your hand and a gun in your nightstand.
Private Sales Don’t Fix It
Some buyers assume the ban only matters at a dealer’s counter because that’s where the background check and the Form 4473 live. It doesn’t work that way. Section 922(g)(3) prohibits receiving or possessing a firearm through any channel: dealer, private seller, family member, gun show.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts The form is just how the rule is enforced at retail.
Section 922(d)(3) also makes it a crime for anyone to sell or give a firearm to a person they know or have reasonable cause to believe is prohibited.5Office of the Law Revision Counsel. 18 US Code 922 – Unlawful Acts A private seller who knows you use medical marijuana and sells you a gun anyway is committing a federal offense alongside you.
A Michigan CPL Doesn’t Override Federal Law
Michigan’s Concealed Pistol License disqualifiers focus on felony convictions, certain misdemeanors, domestic violence orders, dishonorable discharge, and mental health commitments. Marijuana use and medical card status are not on the list.6Michigan Legislature. Michigan Compiled Laws 28.425b Under state law alone, a cardholder can qualify for a CPL.
This can create a false sense of safety. A Michigan CPL does not cure the federal prohibition. You remain a prohibited person under § 922(g)(3) no matter what the state issues you. The ATF’s Brady Permit Chart treats 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 rely on your CPL and skip the federal check, which means a sale can physically go through. You would still be violating federal law the moment you took the gun home. A completed purchase is not a legal one.
Penalties for Answering “No” on Form 4473
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 publicly committed to pursuing these cases aggressively.8Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Prosecutors Aggressively Pursuing Those Who Lie in Connection With Firearm Transactions
Cardholders carry an extra risk the general public doesn’t: the evidence trail already exists. Your name sits on a Michigan registry of medical marijuana patients. If a federal investigation ever links that registry entry to a Form 4473 where you answered “no” to the controlled substance question, the case is largely pre-built. A false-statement charge can stack on top of a separate possession charge under § 922(g)(3).
If You Stop Using and Let the Card Expire
If you stop using marijuana and let your card lapse, you are no longer an active user, and in time you should fall outside the prohibited category. Federal law does not spell out how much time has to pass. The statute reaches “unlawful users,” which courts have generally read as current or recent users rather than people with distant past use. The boundary between “recent” and “former” is not defined.
There is no paperwork to file with the ATF, no clearance letter, no formal restoration process. The practical approach is to let enough time elapse after your last use that no reasonable person could call you a current user, and to confirm your card has expired and is off any active registry. How much time is enough is a judgment call worth running past a lawyer who handles firearms matters in Michigan. Checking “no” on Form 4473 while your card is still active, or while your use is recent, remains dangerous no matter what you intend going forward.
Is This Likely to Change?
Two developments are worth knowing about, though neither helps a Michigan cardholder today.
First, in 2025 the Fifth Circuit ruled in United States v. Daniels that § 922(g)(3) 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 the actively intoxicated, but not for stripping gun rights based on habitual or occasional drug use alone. The Fifth Circuit covers Texas, Louisiana, and Mississippi. Michigan is in the Sixth Circuit, which has not issued a similar decision. Until the Sixth Circuit or the Supreme Court rules, Michigan residents cannot rely on Daniels as a defense.
Second, the DEA has been working since 2024 on rescheduling marijuana from Schedule I to Schedule III, and that process remains unfinished. Even if it is completed, the Congressional Research Service has concluded that moving marijuana to Schedule III, without further legislation, “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 require a federal prescription, and there is no federal prescription framework for marijuana. Cardholders would likely still count as unlawful users for firearm purposes unless Congress separately creates a lawful pathway or amends the Gun Control Act.
Until one of those changes actually arrives in Michigan, the answer to the question stays the same: holding a Michigan medical marijuana card and owning or buying a firearm are legally incompatible under federal law, and the consequences for ignoring that fall on you.