AR extractor O rings (2 ea)
When these O rings are placed around the extractor spring (between the extractor and the bolt) they increase the inward tension of the extractor. This typically improves extraction.
Made from Mil Spec Oil resistant BUNA: ASTM D2000, MIL-P-25732, SAE AS568, SAE J200-65° to 275°
Made from Mil Spec Oil resistant BUNA: ASTM D2000, MIL-P-25732, SAE AS568, SAE J200-65° to 275°