a magazine body having a top portion, a bottom portion, a left sidewall extending from the top portion to the bottom portion, a right sidewall extending from the top portion to the bottom portion, the right sidewall being spaced apart from the left sidewall to define a magazine body recess, the left sidewall and the right sidewall being generally parallel to each other, wherein a central magazine plane is defined between the left sidewall and the right sidewall, wherein the magazine body further includes a left rear wall extending from the left sidewall toward the central magazine plane, and a right rear wall extending from the right sidewall toward the central magazine plane; wherein the left rear wall has an outer portion adjacent the left sidewall and an inner portion located closer to the central magazine plane; and wherein the right rear wall has an outer portion adjacent the right primary sidewall and an inner portion located closer to the central magazine plane, wherein a rear wall reference line is defined between the outer portion of the left rear wall and the outer portion of the right rear wall, wherein the left rear wall and is configured such that the inner portion of the left rear wall is separated from the rear wall reference line thereby defining a left rear wall cant angle between the left rear wall and the rear wall reference line, and wherein the right rear wall and is configured such that the inner portion of the right rear wall is separated from the rear wall reference line thereby defining a right rear wall cant angle between the right rear wall and the rear wall reference line.