SOPMOD Bolt Upgrade/Rebuild KitKit includes: Extractor made to USGI specs (shot peened) Extractor pin BCM Extractor Spring (chrome silicon, heat treated & stress relieved, shot peened) 3 USGI Gas Rings Crane Ind O Ring (Mil Spec) Black Extractor Insert Based on the SOPMOD designed bolt upgrade and rebuild package, this kit is designed to breathe new life into your bolt assembly. The bolt assembly is the heart of your AR15 rifle system and preventative maintenance used by
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