Franklin Armory BFSIII CZ S1 Cause Operation:Protected –Will not fireplace.Semi – Fires 1 spherical for every pull.Binary – Fires one round on pull and 1 round on release.* Ambidextrous Basic safety Selector.Will Suit most CZ Scorpion firearmsAmbidextrous Protection SelectorLaunch round could be canceled simply by going our Patented selector