The SR-15 Field Repair Kit includes the essential components to keep your rifle running over the long term. Also compatible with SR-16 variants. Field Repair Kit Contents: (1x) Ejector (1x) Ejector Roll Pin (1x) Ejector Spring (1x) Extractor (1x) Extractor Pivot Pin (2x) Extractor Springs, Heavy (1x) Cam Pin (1x) Firing Pin (1x) Firing Pin Retainer Pin (3x) Gas Rings NOTE: This Field Repair Kit contains proprietary parts that are compatible with SR-15/SR-16 E3 platforms ONLY. It is not for use with standard AR-15 platforms. Mfg: Knights Armament