Colt Firearms Field Repair Kit Features The Colt Firearms Field Repair Kit bundles 19 individual components that cover the most commonly replaced small parts in an AR15/M4 lower receiver. Included are the ring bolt trigger spring hammer spring bolt catch roll pin bolt catch spring disconnect spring bolt catch plunger and hammer pin retainer along with the magazine catch spring and hammer and trigger pins. Rounding out the kit are the spring detent takedown pin detent takedown pin fire control selector detent ejector and safety detent spring buffer retainer and its spring takedown pin firing pin and firing pin retaining pin. Having every one of these parts in a single kit means a worn spring or lost detent does not have to end a range day or a maintenance session. Because every part is genuine Colt hardware built to mil-spec tolerances the kit installs into a Colt or mil-spec compatible AR15/M4 lower without the fit issues that can come with mixed aftermarket small parts. The finish is black to match standard AR hardware and the compact kit packaging makes it easy to toss into a range bag or a dedicated maintenance kit. This is the kind of kit a shooter keeps on hand rather than buys after something breaks since the parts most prone to loss or wear are exactly what is included. For AR15/M4 owners who service their own rifles the Colt Firearms Field Repair Kit is a practical factory-sourced way to stay ready. Colt Firearms Field Repair Kit Specifications Manufacturer: Colt Firearms Model: Field Repair Kit Type: Kit Color: Black Compatible Hosts: AR15 M4 Pieces: 19 Available At: GrabAGun