Geissele Automatics first trigger, the Hi-Speed National Match, was designed by its founder Bill Geissele for CMP and NRA Hi-Power Rifle competitions. Although the trigger was designed for sport shooting, the US military quickly found that the Geissele Hi-Speed trigger could also find applications in semi-automatic sniper weapons. In 2005, Geissele Automatics received a request from the US Department of Defense to build a trigger unit that's as good as the Hi-Speed. In response, Bill designed the Geissele Super Select Fire Trigger (SSF).
After rigorous testing, the SSF was used by units in the US Special Operations community and is the trigger for the M4 carbine. An evolution of the SSF trigger emerged to meet the needs of law enforcement and civilians who do not require a semi or full auto.