SUPER SEMI-AUTOMATIC TRIGGER•2-stage design for safety & control •Carrot-like 2nd stage break •Full power hammer spring •Tool steel construction •Crane NSWC Safety Certification •Small pin •Approx. pull wts.: 1st - 2.5 2nd - 2.0 for a total of 4.5 lbs. •Fits: AR-15 AR-10 & FNH SCAR rifles