The O'Malley administration also claims they have passed a bill that limits the size of a magazine. Is this true? No! While you may not buy or transfer a magazine that contains more than 10 rounds in Maryland, you may continue to possess a 15 round magazine. You can also legally purchase a 15 round magazine in another state and bring it into Maryland. There are millions of 12, 13, 15 round magazines in Maryland. Contrary to the thoughts of some lawmakers, these magazines are not disposable. They have a very long shelf life. Magazines with a capacity of more than 10 rounds will remain prevalent in our state forever. This law does nothing to change that.