Franklin Armory BFSIII BT-C1 Binary Trigger B&T APC9 Curved

The Franklin Armory BFSIII BT-C1 is the binary trigger for the B&T APC9, and Franklin also lists it for the APC45 and GHM9. It has a curved trigger and an ambidextrous safety selector.

Position 1 is safe, position 2 fires one round per pull, and position 3 (binary) fires one round on the pull and one on the release. Moving the selector out of binary while holding the trigger back cancels the release round. Some B&T guns need slight fitting inside the lower to accept it, and that change still lets the original trigger go back in. Binary triggers are not legal for civilian sale in every state, so check your state and local law first.