In the United States, there is no limit to the number of magazines that a person can carry at one time. However, certain states may have restrictions on magazine capacity or even ban magazines altogether. For instance, in California, it is illegal to possess any magazine with a capacity of more than 10 rounds. Additionally, some states may have restrictions on the types of firearms that are allowed to be used with larger-capacity magazines. In general, the federal government has placed no restrictions on the size and quantity of magazines people can carry within the country.