AR pistols are not legal to buy, sell, or transfer in Maryland. The state’s Firearm Safety Act of 2013, effective October 1, 2013, classifies the Colt AR-15, CAR-15, and all imitations as prohibited assault weapons, and Maryland treats any AR-pattern firearm as an imitation regardless of manufacturer or barrel length.1Maryland General Assembly. Maryland Public Safety Code Section 5-101 – Definitions The one narrow path to lawful ownership is a firearm you already possessed in Maryland before that October 2013 date.
Why AR Pistols Fall Under the Ban
Maryland’s regulated firearms list in Public Safety §5-101 names the “Colt AR-15, CAR-15, and all imitations except Colt AR-15 Sporter H-BAR rifle.”1Maryland General Assembly. Maryland Public Safety Code Section 5-101 – Definitions An AR pistol uses an AR-15-style lower receiver with a short barrel and no shoulder stock. Because it shares the AR-15 platform, Maryland reads it as an imitation, which drops it into the banned category rather than the ordinary handgun category.
The actual prohibition sits in Criminal Law §4-303, which bars manufacturing, selling, purchasing, receiving, or transferring assault weapons within the state.2Maryland General Assembly. Maryland Criminal Law Code Section 4-303 – Assault Weapons – Prohibited The Firearm Safety Act (Senate Bill 281) put this framework in place on October 1, 2013.3Maryland General Assembly. 2013 Regular Session – Senate Bill 281 Chapter No licensed Maryland dealer can sell you an AR pistol, and no private party can lawfully transfer one to you. The transaction itself is what the law prohibits.
Grandfathered Pre-Ban Ownership
If you lawfully possessed an AR pistol in Maryland before October 1, 2013, you can keep it. That is the only route to legal AR pistol ownership in the state today.
The protection is narrow. Selling a grandfathered AR pistol to another Maryland resident is generally prohibited, even through a licensed dealer. Passing one to an heir is the main permitted transfer. You also cannot modify a grandfathered firearm into a new prohibited configuration.
If your pre-2013 ownership is ever questioned, documentation matters. Hold on to your purchase receipt, the original background check paperwork, or anything else that fixes the date you acquired the firearm.
Penalties
Possessing, selling, or transferring a prohibited assault weapon is a criminal offense under Criminal Law §4-303.2Maryland General Assembly. Maryland Criminal Law Code Section 4-303 – Assault Weapons – Prohibited A conviction can bring imprisonment and fines, and it leaves a permanent criminal record.
Liability isn’t limited to completed sales. Attempting to buy an AR pistol, assisting a transfer, or bringing one into the state can each expose you to criminal charges. If a specific firearm’s status is unclear, talk to a Maryland firearms attorney before acting.
Moving to Maryland With an AR Pistol
Relocating doesn’t reset the analysis. You cannot lawfully bring an AR pistol into Maryland and keep it, even if you owned it legally in your previous state. Grandfathering applies only to firearms that were already lawfully in Maryland before October 2013, not to firearms crossing the state line after that date.
Traveling Through Maryland
Federal law offers some protection when you’re passing through. Under the Firearm Owners’ Protection Act, 18 U.S.C. § 926A, you may transport a firearm through any state as long as you can lawfully possess it at both origin and destination.4Office of the Law Revision Counsel. 18 U.S. Code 926A – Interstate Transportation of Firearms The firearm has to be unloaded, and neither it nor the ammunition can be readily accessible from the passenger compartment. If the vehicle has no separate trunk, use a locked container other than the glove box or console.
In practice, FOPA is thin cover. It protects genuine transit, not extended stops. If you’re stopped in Maryland with an AR pistol, you’ll be the one showing the trip was continuous. Restrictive states have pressed the edges of the statute in the past, so a Maryland stopover with a prohibited firearm is a risk you don’t want to take on unless your route and timing are clean.
Federal Brace Rule and SBR Conversion
The ATF’s 2023 stabilizing brace rule, which would have swept braced pistols into the National Firearms Act as short-barreled rifles, is no longer in effect. Federal courts in the Fifth and Eighth Circuits found the rule arbitrary and unenforceable, and the Department of Justice dropped its appeal in 2025. At the federal level, braced pistols aren’t short-barreled rifles, and stabilizing braces remain legal to own and use.
Maryland’s ban runs on its own track. The state prohibits AR-pattern firearms as imitations of the Colt AR-15 no matter how the ATF classifies them, so the shift in federal treatment doesn’t open any door in Maryland.
Converting a lawful out-of-state AR pistol into a short-barreled rifle by adding a stock still triggers NFA process, even though the federal tax stamp dropped to $0 in January 2026. You’d file an ATF Form 1 to manufacture or a Form 4 to transfer, submit fingerprints and a passport photo, notify your local chief law enforcement officer, and wait for approval. Interstate movement of an NFA-registered short-barreled rifle needs prior ATF authorization on Form 5320.20.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or to Temporarily Export Certain National Firearms Act Firearms None of it clears a path into Maryland: the state ban applies regardless of federal registration status.