The Colt AR-15 Bolt Repair Kit contains high quality components for the AR-15 made to strict military specifications. This genuine Colt product will provide excellent fit and reliable function in your AR series rifle and is perfect for upgrading existing components or replacing worn or broken parts. IncludesExtractorGas RingsEjector and Safety Detent SpringEjectorExtractor Spring AssemblyExtractor PinEjector Spring PinFiring Pin Retaining Pin