Aero Precision M5 Lower Parts Kit, For AR15, Magpul MOE Grip in Flat Dark Earth, M5 (.308) Takedown Pin, M5 (.308) Pivot Pin, Takedown/Pivot Detent, Takedown/Pivot Spring, M5 (.308) Bolt Catch, Bolt Catch Buffer, Bolt Catch Roll Pin, Bolt Catch Spring, Extended Magazine Catch Button, Magazine Catch Body, Magazine Catch Spring, Buffer Retainer, Buffer Retainer Spring, Safety Selector, Safety Selector Spring, Safety Selector Detent, 4-40 Set Screw, Trigger, Hammer, Trigger Spring, Trigger/Hammer Pins, Hammer Spring, Disconnector, and Disconnector Spring APRH100973