PISTOL GRIP SHOTGUN: MOSSBERG MODEL 500 PISTOL GRIP SHOTGUN, SERIAL NUMBER U356087, BLACK (MATTE), CASE NOT INCLUDED, 19, PUMP ACTION, 12 GAUGE Notes: Mossberg 500 Pistol Grip Shotgun 12GA Description: Type: 12-gauge pump-action shotgun. Size: Compact configuration with a pistol-grip stock arrangement. Capacity: Varies by specific Mossberg 500 configuration. Features: Pump-action operation, tang-mounted safety, and interchangeable Mossberg 500 components. Weight: Varies by configuration. Design: Compact shotgun configuration incorporating the Mossberg 500 platform. Summary: The Mossberg 500 Pistol Grip Shotgun is a 12-gauge pump-action shotgun based on the Mossberg 500 platform, featuring a compact configuration and pistol-grip arrangement.