Geissele Automatics, Hi-Speed Match Universal Trigger, Includes 1 Trigger and 3 Springs (for the Hi-Speed Match, Hi-Speed DMR and Hi-Speed Service Trigger) Hi-Speed National Match Triggers Geissele Automatics currently offers three large pin Hi-Speed trigger products. These adjustable triggers are specially designed for competition, hunting, tactical, and military use, where both accuracy and robustness are critical. As an adjustable trigger, the first and second stage weight distribution, as well as, total pull weight, over-travel, and sear engagement are all to be tuned to the shooters preference. SERVICE RIFLE: TYPE: 2 Stage 1st Stage Weight: 3.2-5lbs.2nd Stage Weight: 0.5-1.5lbs.Total Pull Weight: As low as 4.5lbs. Features of Geissele AR-15 Hi-Speed National Match Trigger Set: The Geissele Service Spring Set: Approved trigger for use in CMP sanctioned competitions, 5-Coil trigger spring which will give a nominal 4 lbs. on first stage, This will allow a light second stage with an icicle-sharp break; The Geissele DMR Spring Set: Designed for tactical and military shooting, Higher second stage weight helps in high-stress shooting situations; The Geissele Match Spring Set: Designed for NRA High Power Rifle competition with highly modified AR-15 Space guns, Pull weight can be adjusted to low levels that enhance trigger control, Full-power hammer spring which imparts more kinetic energy into the firing pin