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". FeaturesM16A1 Forward Assist Assembly - TeardropIncludes Forward Assist, spring and pinPerfect for your retro buildCompatible with standard AR uppers