The Colt AR-15 High Wear 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. IncludesGas RingsExtactorHammer SpringSpringEjector And Safety Detent SpringHammer And Trigger PinExtractor Spring AssemblyDisconnect SpringEjector Spring PinExtractor PinFiring Pin Retaining PinTrigger Spring