Franklin Armory BFSIII CZ S1 Induce Operation:Secure –Will not fireplace.Semi – Fires one round for each pull.Binary – Fires one round on pull and one spherical on release.* Ambidextrous Security Selector.Will Fit most CZ Scorpion firearmsAmbidextrous Security SelectorRelease round may be canceled by just relocating our Patented selector outs