This kit includes: Battle trigger group (nickel boron coated) Billet tool-less trigger guard Black ergo grip Black KNS anti-rotation Gen2 Mod 2 Ambidextrous safety Pistol grip Bolt catch Bolt catch spring Bolt catch roll pin Bolt catch plunger Magazine catch Magazine catch spring Magazine catch button Front pivot and rear takedown pins with detent and springs Aluminum trigger guard with spring loaded detent and roll pin Buffer retainer spring and plunger Grip screw and star washer