Kit Includes: LR-19 A15 Disconnector LR-18 Front Pivot Pin LR-30 Takedown Pin BT-07 Extractor BT-01 Gas Rings (3) BT-16 Firing Pin Retaining Pin (3) LR-27 Detent (Selector) LR-15 Takedown Detents LR-28 Trigger Pin LR-29 Hammer Pin LR-32 Hammer Spring LR-22 Trigger Spring BT-14 AR Firing Pin BT-03 Extractor Pin BL-03 Gas Tube Roll Pin BT-04 Ejector Roll Pin UR-22 Rear Base Spring Pin LR-04 Trigger Guard Pin LR-12 Bolt Catch Release Pin LR-02 Buffer Retainer Spring LR-26 Selector Spring LR-09 Bolt Catch Spring LR-14 Detent Spring UR-05 Ejector Port Cover Spring FS-04 Front Sight Spring BT-05 Ejector Spring UR-08 Extractor Spring Assembly LR-31 Disconnector Spring LR-14 Detent Spring LR-16 Magazine Catch Spring