The Binary Firing System GEN 3 (BFSIII) is a 3-position trigger. In position 3, it fires one round on pull and one round on release. This trigger is ideal for having more fun than you thought was possible with your Ruger PC Charger and Ruger PC Carbine. TRIGGER OPERATION: Position 1 Safe Will not fire Position 2 Semi Fires 1 round per pull Position 3 Binary Fires 1 round on pull and 1 round on release FEATURES: Release round can be canceled by simply moving Franklin Armory’s Patent Pending selector out of Binary mode while holding the trigger Mfg: Franklin Armory