Complete Mil-Spec M16 bolt carrier group for 5.56mm/.223 and 300 BLK. Bolt: 9310 Steel Phosphate Finish Carrier: 8620 Steel Chrome Lined Phosphate Finish Extractor: 4140 Steel Phosphate FinishAll CMMG products come with their Lifetime Quality Guarantee.
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5.56 HEAVY BOLT CARRIER GROUP
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