TriggerTech Trigger, 1.5-4.0LB Pull Weight, Fits AR-15, Diamond Flat Trigger, Right Hand, Adjustable, Black Finish, Includes Installation Tools, Instructions Book, & TriggerTech Patch AR0-TRB-14-NNF High quality components and precise manufacturing make TriggerTech parts ideal for maintaining and upgrading firearms. The durability" reliability and excellent build quality of these parts will ensure years of service you can count on.