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Rock River Arms AR-15 Bolt Carrier Group


The Rock River Arms AR-15 bolt group assembly is machined from 8620 carbon steel, that is heat treated.  Exterior of carrier is parkerized and interior is chrome-lined.  Uses a Mil-Spec gas key that is chrome-lined, heat treated and secured to the carrier with Grade 8 fasteners that are properly staked.  The bolt assembly is machined from Carpenter No. 158® steel, shot-peened, and has a tool steel extractor that is machined from bar stock.