Aero Precision's line of Lower Parts Kits featuring Magpul(TM) Grips is designed to be versatile for your needs.This M5 Lower Parts Kit includes the components needed to assemble an Aero Precision M5 Lower Receiver. It features a Magpul MOE(R) Grip. See below for a full list of included components.*M5 Specific Parts include: M5 Takedown Pin, M5 Pivot Pin, M5 Bolt Catch and Extended Magazine Catch Button.Includes: Magpul MOE(R) Grip in Black or FDE *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 (for threaded takedown pin detent hole) Trigger Hammer Trigger Spring Trigger/Hammer Pins Hammer Spring Disconnector Disconnector Spring