Sons of Liberty Gun Works Bolt Rebuild Kit The Bolt Rebuild Kit includes the essential components to keep your AR15/M4 rifle running over the long term. Field Repair Kit Contents (1x) Ejector Spring (1x) Extractor (1x) Extractor Pivot Pin (1x) Extractor Spring & Insert (3x) Gas Rings Note: Not for use with KAC SR-15/SR-16 rifles. Click here to browse our entire selection of Bolt Carrier Groups & Parts.
