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. Works in most AR platforms and calibers including 5.56 NATO 308 Win 300 BLK 9mm Rimfire etc.3-Position Selectable - Safe Semi & BinaryBinary (Pull & Release)Fits in Multiple platformsEasy to Install