Yes, but there are certain restrictions depending on the type of magazine.
Generally, gun magazines can be bought online or in person, but they must not have a capacity of more than 10 rounds unless you can provide documentation that you need a higher capacity for religious purposes or because you’re a collector.
If you’re buying a gun magazine online, the seller must be licensed in Maryland and the sale must go through a licensed firearms dealer in your state. The dealer will need to conduct a background check on you before completing the sale.
Some types of gun magazines are completely banned in Maryland, including those that are designed to be easily converted to a high-capacity magazine. These types of magazines are usually made from a drum or a helical feed device.
If you have any questions about whether or not you can purchase a particular type of gun magazine in Maryland, it’s best to consult with a firearms dealer or attorney who is familiar with the state’s laws.