Franklin Armory BFSIII CZ S1 Trigger Operation:Secure –Will not fire.Semi – Fires one spherical for every pull.Binary – Fires 1 round on pull and 1 round on launch.* Ambidextrous Protection Selector.Will Suit most CZ Scorpion firearmsAmbidextrous Basic safety SelectorLaunch spherical may be canceled simply by moving our Patented selector away