The Lower Parts Kit for AM-15 includes the following: Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch Spring, Buffer Retainer, Buffer Retainer Spring, Disconnect, Disconnect Spring, Stainless Steel Hammer, Hammer Pin, Hammer Spring, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Pistol Grip (A2 style), Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent Spring, Selector, Selector Detent, Selector Detent Spring, Takedown Pin,...