Crafted from matte, chrome-plated metal components and a synthetic, pistol-grip stock, the Winchester SXP Marine Defender 20 Gauge Pump-Action Shotgun has a capacity of 4-rounds. Its barrel measures 18 inches long with chrome lining. Includes a bead front sight and the Invector-Plus choke system. Winchester SXP Marine Defender 20 Gauge Pump-Action Shotgun - Shotgun Manual at Academy Sports