Shop › CMC AR-15 LPK W/FLAT TRIGGER CMC AR-15 LPK W/FLAT TRIGGER $224.10 CMC Triggers AR-15 Lower Receiver Parts Kit with 3.5lb Flat Trigger, Black 81503 Quantity: Add To Cart Added! CMC Triggers AR-15 Lower Receiver Parts Kit with 3.5lb Flat Trigger, Black 81503