Patent 10996009 was granted and assigned to Amend2 on May, 2021 by the United States Patent and Trademark Office.
A cartridge magazine is provided. The cartridge magazine may include a rib mounted on a vertical wall of the cartridge magazine. The cartridge may further include a ramp attached to a top of the rib. In another embodiment, the cartridge magazine may include an opening including spacer having a flat portion. The flat portion provides space for a cartridge of a particular caliber between the flat portion of the spacer and an opposing wall of the cartridge magazine.