The Linemount Retro line is designed to be a faithful reproduction for those that have a longing for the guns of the past, without the sticker shock of a collectible original. Whether you have nostalgia for a weapon of your own youthful days, or you were just born too late, these Retro parts will scratch your itch for the "Good Old Days". FeaturesStyled after the Mid 1960's era flash hidersPerfect for retro and clone buildBore- Up to 30 calHeat Treated for strength and durabilityPhosphate Coated for corrosion resistanceMilled flats for easy installation