Franklin Armory BFSIII CZ S1 Cause Operation:Harmless –Will not likely fire.Semi – Fires one spherical per pull.Binary – Fires 1 spherical on pull and one round on release.* Ambidextrous Protection Selector.Will In good shape most CZ Scorpion firearmsAmbidextrous Security SelectorRelease spherical may be canceled simply by going our Patented