Carbon Rib – High, Fits, Ethos 12-Ga. With 28 Barrel MPN 60413. The carbon fiber rib provides a light weight option for sighting in on the target for the Benelli Ethos. This item may be regulated for export by the U. Department of State or US Department of Commerce. This item is in the category “Sporting Goods\Hunting\Gun Parts\Shotgun Parts”. The seller is “euroopticltd” and is located in this country: US. This item can be shipped to United States.