The Aero Precision 5.56 Bolt Carrier Group (Black Nitride) is a premium, American-made BCG engineered for reliability and long service life in AR-15 builds. Built around a M16-cut 8620 steel carrier and a 9310 tool-steel bolt, this BCG is shot-peened, HPT-tested, and MPI-marked for consistent strength and durability. A Black Nitride finish delivers low friction and easier maintenance, while the carrier’s forward-assist serrations and a properly staked gas key ensure dependable performance under heavy use.
Whether you’re building a duty rifle or tuning a precision AR, this Aero Precision BCG delivers the quality features shooters expect — and ships from a trusted supplier. Pick up your Aero Precision BCG at AR-15 Discounts for fast checkout and competitive pricing.
Key Features
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M16-cut carrier for proven compatibility and function
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Machined from 8620 steel (carrier)
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Forward-assist serrations on the carrier for positive engagement
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Black Nitride finish — lower friction, reduced need for lubrication and easier cleaning
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Properly staked gas key for secure, reliable operation
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Bolt machined from 9310 tool steel for high strength
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Shot-peened, HPT tested and MPI marked for durability and safety
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Black o-ring extractor insert for improved extraction consistency
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