Franklin Armory BFSIII CZ S1 Result in Procedure:Safe –Won't hearth.Semi – Fires one round for every pull.Binary – Fires 1 spherical on pull and one round on release.* Ambidextrous Security Selector.Will Suit most CZ Scorpion firearmsAmbidextrous Protection SelectorRelease spherical can be canceled by just shifting our Patented selector away