Shop › HF AR15/10 2 STAGE FLAT TRIGGER HF AR15/10 2 STAGE FLAT TRIGGER $213.75 Hiperfire X2S Mod-3, Semi Drop-In Trigger Kit, 2-Stage, Fits AR15/AR10/PCC/MPX, Black Color, Black Nitride Finish, Flat Trigger, 1st Stage 2-3LB, 2nd Stage 1.5LB, Overall 3.5-4.5LB X2SM3 Quantity: Add To Cart Added! Hiperfire X2S Mod-3, Semi Drop-In Trigger Kit, 2-Stage, Fits AR15/AR10/PCC/MPX, Black Color, Black Nitride Finish, Flat Trigger, 1st Stage 2-3LB, 2nd Stage 1.5LB, Overall 3.5-4.5LB X2SM3