Includes: Magpul MOE® Grip in Black or FDE Takedown Pin Pivot Pin Takedown/Pivot Detent Takedown/Pivot Spring Bolt Catch Bolt Catch Buffer Bolt Catch Roll Pin Bolt Catch Spring Magazine Catch Body Magazine Catch Button 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) This specific kit does NOT include a fire control group. This is a great option for those planning to buy an upgraded trigger. Need a fire control group? Check out our M4E1 Lower Parts Kit with Magpul™ MOE® Grip.