The DPMS Field Repair Kit Includes:LR-22 Trigger SpringBT-07 ExtractorBT-08 Extractor Spring AssemblyLR-31 Disconnector SpringLR-32 Hammer SpringBT-03 Extractor PinBT-16 Firing Pin Retaining PinBT-14 Firing PinBT-05 EjectorBT-06 EjectorFeatures : For Builds or Repairs Fits AR-15