Includes all of the following: Disconnector Spring Hammer Pin & Trigger Pin Selector Selector Spring Selector Detent Magazine Catch Magazine Catch Spring Aluminum Magazine Catch Button Bolt Catch Bolt Catch Detent Bolt Catch Spring Bolt Catch Roll Pin Take Down Pin Take Down Detent Take Down Detent Spring Front Pivot Pin Front Pivot Pin Detent Front Pivot Pin Detent Spring Aluminum Trigger Guard Trigger Guard Roll Pin Buffer Retainer Detent Buffer Retainer Spring A2 Pistol Grip Pistol Grip Screw Pistol Grip Lock Washer Trigger Trigger Spring Hammer Hammer Spring Disconnector