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.Model: Lower Parts KitTrigger: Curved