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 this trigger ideal for both tactical and competition use. The BFSIII provides greatly reduced split times between rounds, allowing for tighter groups. The AR-Essential trigger comes with just the essential trigger components needed to install the Binary Trigger into your AR. This makes the the AR-Essential trigger a cost effective trigger option.