Franklin Armory BFSIII B&T-C1 Trigger - Binary Firing System for B&T APC9 BT-C1 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, making it the fastest semi-automatic trigger on the market. This trigger is ideal for both tactical and competition use. The BFSIII provides greatly reduced split times between rounds, allowing for tighter groups. Features of Franklin Armory BFSIII B&T-C1 Trigger - Binary Firing System for B&T APC9: Release round can be canceled by simply moving our Patent Pending selector out of Binary mode while holding the trigger back Easy to install Smooth trigger pull: 4.5 lbs, +/- 0.5 lbs Positive reset on release phase Enhanced buffer springs for optimal flexibility Works in most AR platforms and calibers including 5.56 NATO, 308 Win, 300 BLK, 9mm, Rimfire, etc.... Compatible with any BCG Great for competition shooters, tactical shooters and recreational enthusiasts 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