Franklin Armory BFSIII CZ S1 Set off Operation:Safe –Won't fire.Semi – Fires one round per pull.Binary – Fires 1 spherical on pull and 1 spherical on launch.* Ambidextrous Basic safety Selector.Will Fit most CZ Scorpion firearmsAmbidextrous Basic safety SelectorRelease round is usually canceled by just shifting our Patented selector out of Bi