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