Coated Bolt Carrier Group

Coated Bolt Carrier Group

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Coated bolt carrier group (full auto version) for AR15, M16, or M4 machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the proper chrome lined and heat treated gas key. Gas key is secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures a strong staking and proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel and shot peened for increased strength per Mil-Spec; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin.

HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).

Complete Mil-Spec M-16 Bolt Carrier with Bolt Assembly HPT/MPI Tested:

  • Mil-Spec BCG Machined from 8620 Aircraft Quality Steel and heat treated to 60-61 RC
  • Mil-Spec Chrome Lined Carrier Interior
  • Mil- Spec Chrome Lined Gas Key
  • Key Staked with Grade 8 Screws, per Mil-Spec
  • Mil-Spec Carpenter 158® Bolt w/ Spring and Ejector 
  • Tool Steel Extractor w/ Spring and viton O-ring
  • Mil-Spec Firing Pin w/ Chrome Finish
  • Mil-Spec Cam Pin
  • Full Auto Carrier (Backward compatible with all semi-auto rifles)
  • 5.56 BCG Weight - 11.55 oz.
Calculated at checkout
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    1. Mystic Bronze

      I bought this for my wife's left handed build. It is everything that was advertised. I will definitely be purchasing more bcgs from cryptic coatings. on 9th Jun 2020

    2. Looks amazing

      This Bolt looks so good, but havent fired it yet t
      For the function test
      on 9th Jun 2020

    3. Amazing

      I have shot almost 10 thousand rounds through my 300 blackout, with cleanining the bolt every 1k-1.5I rounds and this bolt has never skipped a beat!
      This will be the only bolt I run on my build from now on!
      on 6th Jun 2020

    4. OMG! Absolutely beautiful

      Received my mystic gold BCG. Super fast shipping, awesome service - I placed my order over the phone. When I opened the package I was blown away by how nice this BCG was very slick applied coating was perfect. on 30th May 2020

    5. I love it

      Only put about 200 rounds through it so far, but it looks great and is buttery smooth. I love it. on 29th May 2020

    6. The absolute best

      put this in a custom build, and it works flawlessly. I cant believe how absolutely smooth it is, and easy to clean on 29th May 2020

    7. Just Bad ass

      Great BCG, Works like a charm and cleans up nicely. The color is just sick. Like to see more products from Cryptic. Recommended to all if you want a Bad ass BCG. on 29th May 2020

    8. Great product

      The bolt carrier group feels much smooth than the stock. It was a great fit and looks very high quality. Very pleased with the product. on 29th May 2020

    9. Smooth

      Awesome product, can’t be more happier!!! on 28th May 2020

    10. Beauty and precision in one small package

      This thing kicks ass. Smooth as oiled glass. And a nice smooth cycle after every shot. Gonna buy more. on 20th May 2020