Colt Firearms Bolt Repair Kit Features The Colt Firearms Bolt Repair Kit bundles the components that see the most friction and spring fatigue inside an AR15/M4 bolt carrier group. The extractor and its spring assembly are included together so the two parts that control case extraction can be replaced as a matched set rather than guessing at compatibility. The ejector and its spring pin are also included addressing the half of the extraction cycle that throws the spent case clear of the ejection port. Rounding out the kit the firing pin retaining pin and bolt rings cover the remaining wear points that keep the bolt sealed and the firing pin properly retained during cycling. Because this is a genuine Colt part it is built to the same tolerances as the factory bolt it is designed to service which matters for reliable lockup and extraction in an AR15/M4 platform. Keeping a kit like this on hand lets an owner or armorer address a failure to extract or eject without waiting on a single replacement part to arrive. The black finish matches factory bolt components for a consistent appearance after a repair. This kit is a practical addition to any range bag or armorer s toolkit for anyone maintaining a Colt-pattern AR15/M4 rifle. Colt Firearms Bolt Repair Kit Specifications Manufacturer: Colt Firearms Model: Bolt Repair Kit Type: Kit Color: Black Compatible Hosts: AR15/M4 Includes: Extractor Bolt Rings Ejector Safety Detent Spring Extractor Spring Assembly Extractor Pin Ejector Spring Pin Firing Pin Retaining Pin Available At: GrabAGun