The Colt Manufacturing Bolt Repair Kit provides everything needed for AR15/M4 bolt maintenance and repair in one comprehensive package. This complete kit includes all essential bolt components for reliable firearm operation.Colt Manufacturing Bolt Repair Kit for AR15/M4Extractor and extractor spring assemblyBolt rings and ejector componentsSafety detent spring includedExtractor pin and ejector spring pinFiring pin retaining pinBlack finish for durabilityPerfect for gunsmiths military law enforcement and civilian AR15/M4 owners who need reliable replacement parts for bolt assembly maintenance and repair operations.