Abstract: A gunstock system having an internal magazine for storage of ammunition cartridges and for providing ambidextrous delivery of the ammunition cartridges. The gunstock has a vertically-oriented internal magazine having an upper opening and a lower reload/discharge opening, an operable cover for closing the upper opening, a biasing element, such as a spring, extending from the cover within the internal magazine to apply downward pressure upon the ammunition cartridges, and biased-retaining arms for operatively opening and closing the reload/discharge opening to permit and restrict removal of the ammunition cartridges from the internal magazine. The ammunition cartridges exit the reload/discharge opening in a forward manner and along the bottom of the gunstock. The gunstock has a bore extending therethrough from a rearward to a forward end of the gunstock for receiving a bolt to secure the gunstock to the receiver or adjacent portion of the firearm.