Abstract: A magazine system for increasing the cartridge storage capacity of a firearm is disclosed. The magazine system may be a magazine that includes a housing that has a capacity for ammunition and a spring mechanism housed within the housing. Additionally, the magazine system may include a connection mechanism that is connectable to the housing, and an extension portion that is insertable into the housing. The extension portion may increase the capacity for the ammunition by enabling the spring mechanism to expand beyond the length of the housing when the extension portion is extended from the housing, thereby making the magazine system easier to load. The magazine system may then be loaded, and the extension portion may then be retracted back into the housing. The connection mechanism may then be utilized to lock the extension portion into a retracted position once the extension portion is retracted back into the housing.