Navigating firearm laws in Maryland requires precision because state statutes outline strict prohibitions on specific models, mechanical configurations, and magazine capacities. If you're trying to figure out what's allowed on the property, you can't rely on guesswork. State definitions target specific assault long guns, designated handguns, and copycat variants that share interchangeable operating parts.
Under Maryland Public Safety and Criminal Law codes, prohibited firearms fall into distinct categories: enumerated assault weapons, copycat weapons defined by feature criteria, and restricted handguns that fail to meet roster requirements. Knowing these parameters keeps collectors, hunters, and sport shooters compliant with Maryland State Police (MSP) enforcement guidelines.
Enumerated Banned Assault Long Guns and Pistols
Maryland law explicitly bans a roster of specific firearm models by name, alongside any structural copies that use interchangeable internal components. The restriction sweeps across classic semi-automatic platforms that entered the market decades ago.
The state statute lists dozens of prohibited assault long guns, including:
- Colt AR-15 variants and common imitations, with specific exemptions like the Colt AR-15 Sporter H-BAR rifle.
- AK-47 in all forms, including imported semi-automatic variants.
- UZI 9mm carbines, rifles, and semi-automatic pistols.
- FN FAL and FN LAR assault rifles.
- Street Sweeper and Striker 12 revolving-cylinder shotguns.
Assault pistols are similarly regulated under separate statutory provisions. Models like the Intratec TEC-9, MAC-10/11 variants, and the SWD Cobray are strictly prohibited from sale, transfer, or transport within state lines. If a handgun matches the functional design or operational layout of a banned platform, it faces immediate rejection by state licensing divisions.
Copycat Weapons and Feature-Based Restrictions
Even if a firearm doesn't appear on the state's named ban list, it can still be classified as a prohibited "copycat weapon" based on its physical characteristics. Maryland targets specific semi-automatic rifle, pistol, and shotgun configurations.
For centerfire semi-automatic rifles with detachable magazines, possessing any two of the following features triggers a ban:
- A folding stock (telescoping or collapsible stocks have distinct regulatory distinctions).
- A grenade launcher or flare launcher.
- A flash suppressor.
Other automatic disqualifiers for long guns include a fixed magazine capacity exceeding 10 rounds or an overall length of less than 29 inches. Semi-automatic shotguns face similar scrutiny; models featuring a folding stock or a revolving cylinder are banned outright.
Magazine Capacity Limits and Ammunition Rules
Maryland enforces a strict statewide limit on ammunition feeding devices. It's illegal to manufacture, sell, offer for sale, purchase, or transfer any detachable magazine that has a capacity of more than 10 rounds.
This restriction applies universally to rifles, shotguns, and handguns. While owning legacy magazines acquired before the ban has faced evolving legal challenges, buying, importing, or selling high-capacity magazines within the state remains prohibited. Shoppers moving into the state must ensure all standard-capacity magazines are permanently modified to accept 10 rounds or replaced entirely before crossing state lines.
The Handgun Roster and Verification Steps
Handguns sold or transferred in Maryland must clear an extra administrative hurdle. They must be approved and listed on the official Maryland Handgun Roster maintained by the Handgun Roster Board.
If a handgun isn't on this roster, licensed dealers can't legally transfer it to a civilian buyer. Testing by the board evaluates safety parameters, manufacturing standards, and concealability metrics before approval.
When you encounter an unfamiliar firearm, use these concrete steps to check its legal status:
- Consult a licensed Maryland firearms dealer who handles state-compliant transfers daily.
- Search the Maryland State Police Firearms Search portal using the manufacturer and model name.
- Review the physical specifications against statutory length and feature thresholds.
- Submit an official Firearm Review Request to the MSP Licensing Division if you're evaluating a custom or ambiguous long gun build.
Common Compliance Mistakes to Avoid
Gun owners often run into trouble by making assumptions about modular parts or out-of-state purchases. A frequent error involves buying a complete rifle online from a national retailer without verifying whether the specific stock or muzzle device configuration complies with Maryland's feature test.
Another mistake involves stripped lower receivers. While a stripped lower receiver isn't an assembled semi-automatic rifle, building it out with a prohibited combination of features immediately creates an illegal copycat weapon. Always verify every component before assembly. Similarly, don't rely on verbal assurances from private sellers regarding unregulated long guns; universal background checks and state transfer laws apply to all regulated transactions.
Frequently Asked Questions
Can I own a firearm that was legal when I bought it if the law changes?
State law generally prohibits the possession, transport, or transfer of newly banned assault weapons regardless of when they were acquired, though specific historical exemptions or grandfather clauses have faced complex litigation. Always check current MSP guidance for specific legacy items.
Are bump stocks and rapid-fire triggers legal in Maryland?
No. Maryland statutes explicitly prohibit rapid-fire trigger activators, bump stocks, and devices designed to accelerate a semi-automatic firearm's rate of fire.
How do I check if a rifle barrel length meets the minimum requirement?
Measure the rifle from the closed breech (or face of the closed bolt) to the tip of the barrel permanently attached muzzle device. For semi-automatic centerfire rifles, the overall length must be at least 29 inches to avoid being classified as a prohibited short rifle configuration under state assault weapon rules.
Can I modify a banned firearm to make it legal?
Yes, if you permanently remove the prohibited features—such as replacing a flash suppressor with an unthreaded target crown or swapping a folding stock for a fixed stock—the firearm may exit the prohibited category, provided it meets all other length and roster criteria. Work with a licensed gunsmith to ensure permanent compliance.
