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The Aero Precision Bolt Carrier Group is a high-quality addition to your AR-15 build. Finished with durable MIL-SPEC manganese phosphate with chrome lined internal and gas key. A properly staked gas key prevents gas leakage that can lead to short stroking. Each assembly is magnetic particle inspected to ensure it is free from defects that can lead to premature failures. MIL-SPEC dimensions ensure correct component function and reliability.
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