The Remington Model SP-10 is a gas-operated semi-automatic shotgun chambered for 10 gauge Magnum shells. It was produced by Remington Arms from 1989 to 2010. The design was based on the Ithaca Mag-10. References External links Owner's Manual Remington SP-10 Magnum Take Down via YouTube Remington Arms firearms Semi-automatic shotguns of the United States Weapons and ammunition introduced in 1989