Mossberg 500AG 12ga

Updated August 24, 2026

This Mossberg 500AG pump-action shotgun is chambered in 12 gauge and is being offered as a parts or repair firearm. Serial number J287375, this example features an approximately 28" ribbed barrel with a shiny bore and is in fair overall condition. The shotgun wears traditional checkered wood furniture paired with the familiar Mossberg pump-action receiver and sporting-barrel configuration. Significant issues are present: the trigger is broken off, the safety selector is broken, some parts may be missing, and visible rust is present on portions of the firearm. Because of these problems, this shotgun will need substantial work before it can operate and should be professionally inspected prior to any attempt at use. Mossberg’s Model 500 family has been one of America’s most successful pump-shotgun designs for decades. This example may appeal to a gunsmith, parts buyer, or collector looking for a restoration project. Please see photos. Mossberg 500AG 12ga Pump 28 Shiny J287375 Fair

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