Detachable rotary magazine constructed from a durable lightweight polymer - Feeds cartridges directly in line with the bolt instead of offset as with traditional leaf-spring magazines for a straight path right into the chamber - Ergonomic magazine-mounted release - Magnum caliber holds three cartridges - Standard caliber holds four cartridges - Unique design holds U.S. patent numbers: 8156675; 8484875 and 8745912