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PMA Nickle Boron Bolt Carrier Group - 556
PMA Nickle Boron Bolt Carrier Group

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Our Price: $159.99

Product Code: PMAAR15BCGNIB556

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PMA Nickle Boron Bolt Carrier Group

PMA AR15 Nickel Boron BCG is a Full-Auto M16 BCG, manufactured using the finest U.S sourced raw materials available. The Nickel Boron coating vastly increases the lubricity and wear resistance while preventing corosion. The Bolt Carrier Group is the heart of your rifle, and if you want to upgrade the functionality and appearance of your rifle, this is a great way to do it! If you’re after the newest high-performance BCG finish.

Product Specifications


  • Manufacturer: MPI
  • Material: 8620 Steel
  • Type: M16 Full Auto
  • Gas Key Material: 4130 Steel; Grade 8 Gas Key Screws
  • Coating: Nickel Boron (NiB)
  • Caliber: 223 Rem | 5.56 NATO
  • Bolt Material: 9310 Steel
  • Coating: Nickel Boron (NiB)
  • Extractor: Machined
  • Extractor Material: D2 Tool Steel
  • O-Ring: Mil-Spec (3)
  • Cam Pin Material: 8620 Steel
  • Firing Pin Material: 416 Stainless Steel
  • Other: MPI Inspected | Shot Peened

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