The lbe ar15 lower parts kit includes the following: trigger guard roll pin; pistol grip screw & lock washer; disconnector & spring; trigger spring & pin; hammer spring & pin; bolt catch buffer spring & roll pin; magazine catch & spring; magazine release button; selector detent & detent spring; takedown pin pin detent & pin detent spring; pivot pin pin detent & pin detent spring; buffer retainer & retainer spring.Gun Model: Lower Parts KitTrigger: Curved