Shop › HF AR15/10 DROP-IN TRIGGER MCX HF AR15/10 DROP-IN TRIGGER MCX $171.00 Hiperfire PDI MCX, Drop-In Trigger Kit, Fits SIG MCX, Black Color, H&M Blacknitride+ Finish, Curved Trigger, 2LB Pull PDIMCX Quantity: Add To Cart Added! Hiperfire PDI MCX, Drop-In Trigger Kit, Fits SIG MCX, Black Color, H&M Blacknitride+ Finish, Curved Trigger, 2LB Pull PDIMCX