This BCM Enhanced Lower Parts Kit includes: BCM PNT Hammer Hammer Spring BCM PNT Trigger Trigger Spring Hammer/Trigger Pins Disconnector Disconnector Spring Bolt Catch Bolt Catch Plunger Bolt Catch Spring Bolt Stop Pin Rear Pivot Pin Buffer Retainer Buffer Retainer Spring Magazine Catch Button Magazine Catch Spring Magazine Catch Rear Take Down Pin Selector (Safety) Selector Detent Selector Detent Spring BCM Enhanced Trigger Guard BCM Trigger Guard Pin BCM Trigger Guard Screw BCM Pistol Grip Mod 3, Grip Screw, Locking Washer Take Down/ Pivot Pin Detent Take Down/ Pivot Pin Detent Spring