Franklin Armory BFSIII CZ S1 Trigger Procedure:Risk-free –Will never fireplace.Semi – Fires 1 spherical per pull.Binary – Fires one round on pull and 1 spherical on launch.* Ambidextrous Security Selector.Will Fit most CZ Scorpion firearmsAmbidextrous Basic safety SelectorLaunch spherical can be canceled simply by going our Patented selector