DoubleStar Field Repair Kit Black. Includes firing pin 2 firing pin retainers a bolt cam pin 3 gas rings a buffer detent buffer detent spring extractor extractor pin 2 extractor springs & pads disconnector disconnector spring hammer spring and a trigger spring. Specifications for DoubleStar Field Repair Kit: Manufacturer: DoubleStar Color: Black Gun Model: AR-15 Package Contents: DoubleStar Field Repair Kit Extractor 2 Extractor pins 2 bumper pads 1 extractor pin 1 extractor O ring 1 disconnector 1 disconnector spring What firearm models does the manufacturer say DoubleStar Field Repair Kit is compatible with? The manufacturer suggests that DoubleStar Field Repair Kit is compatible with AR-15DoubleStar AR785: Field Repair Kit Black