Kit Includes: Bolt catch/roll pinBolt catch plunger/springTrigger guard/roll pinTriggerTrigger springDisconnectorDisconnector springHammerHammer springTrigger/hammer retaining pinsSafety, detent, & springMagazine catch, spring, & release buttonPivot/takedown pins, detents, & springsA2-style pistol grip/grip screw & washerBuffer retainer/spring