TROY Industries Bolt Release, Ambidextrous, Black SBOL-AMB-00BT-00 The Ambidextrous Bolt Release is an indispensable device that easily releases or holds bolt open with one hand to streamline firearm clearing and reloading after a malfunction. By being ambidextrous" this bolt release eliminates hand changeovers improving control of rifle when in use. Made from hardened aircraft aluminum.