WHAT DOES OCK ISLAND 20 GAUGE SINGLE SHOT MEAN?

SKU 52780129 - RIA's Regular single shot shotgun features a vent rib, contoured barrel with muzzle brake. It utilizes a woodgrain polymer inventory, silver anodized receiver and black barrel.Single Shot comes again to lifestyle with this particular 20" 12GA Rock Island Armory. Vented Rib barrel with barrel chromed within, this shotgun cannot be con