Aero Precision AR-15 Nickel Boron Bolt Carrier Group



Aero Precision Nickel Boron 5.56 BCG

Aero Precision’s NiB bolt carrier group features more than just a chrome-like finish. The bolt receives magnetic particle inspection (MPI) and is shot-peened to ensure surface hardness. The tool steel extractor provides reliable extraction, enhanced by a Viton O-ring around the spring. Plus, the gas key is secured with Grade 8 hardware and properly staked to ensure durability.

Ultra-Slick Nickel Boron Finish

Nickel Boron imparts several benefits to your AR-15. The slick surface makes the entire BCG ride smoother inside the action, reducing wear on the upper receiver. Not only that, but that shiny exterior also makes it extremely easy to clean the bolt, with most carbon buildup able to be wiped away with just a cloth between range days.


  • Caliber: .223/5.56, .300 Blackout, .350 Legend
  • Finish: Nickel Boron
  • Carrier Type: M16/Full Auto Capable (Best for AR-15)
  • Carrier: 8620 Gun Steel
  • Bolt: 9310 Steel, HPT Tested, and MPI Marked
  • Mil-Spec O-Ring and Gas Rings
  • Weight: 11.5 oz.
  • Country of Origin: USA
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