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Wilson Combat AR-10 / 308 / 6.5 Creedmoor Bolt Carrier Group Nickel Boron
Lantac Enhanced .308 Bolt Carrier Group
Lantac Enhanced .308 Bolt Carrier Group – Black Nitride
Rise Armament .308 Bolt-Carrier Group – Black Nitride
JP Enterprises .308 High Pressure Bolt Completion Group – DLC
JP Enterprises AR-10 Variable Mass Operating System H2 Bolt Carrier Group w/ .308 EnhancedBolt