Aero Precision PRO Series AR-15 Black Nitride Bolt Carrier Group



Go PRO – The Best BCG that Aero Precision has to Offer

The Aero Precision PRO 5.56 Bolt Carrier Group represents the best value for the most prolific, high-volume shooters. Each component’s material has been carefully chosen to ensure a long service life, reliable function, and minimized wear. This BCG can withstand an aggressive firing schedule, with an easy-to-clean Black Nitride finish on every component.

There are no mystery meat components here – only top-quality parts carefully chosen to give you optimal performance.

9310 Steel Bolt – Better than Carpenter 158?

You’ll see a lot of claims online that C158 steel is the only steel for an AR-15 bolt because that’s what the military uses. Frankly, it’s not true, and that’s why Aero Precision went with 9310 steel for the most important part of the BCG. The bolt is heat treated to provide superior strength and durability, as well as shot peened and MPI tested to ensure the quality.


  • Caliber: .223/5.56, .300 Blackout, .350 Legend
  • Finish: Black Nitride
  • Carrier Type: M16/Full Auto Capable (Best for AR-15)
  • Carrier: 8620 Gun Steel
  • Gas Key: 4140 Steel
  • Gas Key Screws: Grade 8, staked
  • Bolt: 9310 Steel, MPI tested, Shot Peened, and Heat Treated
  • Extractor: 4140 Steel
  • Cam Pin: 4140 Steel
  • Ejector: S7 Tool Steel
  • Firing Pin: 8640 Steel, Black Nitride Treated
  • Mil-Spec O-Ring and Gas Rings
  • Weight: 11.5 oz.
  • Country of Origin: USA
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