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Lightweight Bolt Carrier Group

Bolt carrier group for AR15, M16, or M4 compatible with semi and full auto versions. Carrier is machined from Mil-Spec 8620 tool steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the Mil-Spec chrome lined and heat treated gas key. Gas key is sealed then secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel then shot peened for increased strength per Mil-Spec; includes tool steel extractor with Wolff spring, viton O-ring , black insert; tool steel ejector pin spring; firing pin chromed finished with firing pin retaining pin and cam pin. Total weight completely assembled 8.2oz. HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).

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

  • Mil-Spec CNC Machined from 8620 Tool Steel case hardened to 58 - 60 rockwell with chrome lined interior
  • Mil- Spec Chrome Lined Gas Key
  • Key Staked with Grade 8 Screws, per Mil-Spec
  • Mil-Spec Carpenter 158® Bolt
  • Mil-Spec Ejector w/ Spring
  • Mil-Spec Extractor w/ Wolff Spring, viton O-ring and insert
  • Mil-Spec Firing Pin w/ Chrome Finish
  • Mil-Spec Cam Pin
  • 5.56 BCG Weight - 8.2oz.
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$300.00
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    1. It’s like a work of art.

      I’ve built and modified enough ARs that it’s tough to be impressed at this point. The light-weight BCG in mystic black is one of the few components I’ve looked at and said “that’s amazing”. Best of all, it’s easy to clean too: just wipe it down and you’re GTG. on 4th Jan 2021

    2. BEST CUSTOMER SERVICE

      With current conditions in the world now I have not been able to go to the range to test the Mystic BCG but I can say that Cryptic Coatings has the BEST CUSTOMER SERVICE that I have experienced! Specifically Summer from Cryptic Coatings. She has been a pleasure to work with over the phone and had my item shipped out the same day that I ordered it! If you need any help from Cryptic Coatings I would definitely recommend Summer. Great people and fast service. The finish on the BCG is shiny, even, looks and feels excellent. on 29th Dec 2020

    3. Mystic Black 224 Valkyrie Lightweight BCG

      Beautiful, functions flawlessly! Looking forward to changing my other BCGs out! on 29th Dec 2020

    4. Color Hue/Weight/Cut Design Different from Advertised.

      I have not tried this lightweight bcg yet but noticed some differences than what is advertised on their website. I got the Lightweight bcg in Mystic Black for a .556 build. The BCG i got is cut differently on the side where the logo is as compared to the pictures on the website. It also weighs 7.9 ounces vs 8.2 ounces that is advertised and im guessing that is directly related to the different style of cut on the bcg i received vs the cut in the pictures they advertise. I also noticed the Mystic Black color I got is a deep pure black color vs the black with a silver/grey sheen or hue that is in the pictures here on their website. I bought the .308 bcg a while back and the color on that bcg looks just like the Mystic Black color variaton shown in their website.

      I will contact Cryptic Coatings and ask why all these changes???
      on 5th Dec 2020

    5. Slickkkkkk

      Haven’t installed it yet to test, but the black coating seems to almost want to slide out of my hand when it’s bone dry. So weird but looks like it will perform well. on 18th Aug 2020

    6. GREAT CUSTOMER SERVICE

      I HAVE 2 BCGs FROM THESE GUYS NOW AND IVE BEEN SUPER IMPRESSED. THEY WAS OUT OF STOCK IN WHAT I WAS LOOKING TO BUY BUT THEY REACHED OUT TO ME WHEN IT WAS AVAILABLE AND GAVE ME THE DISCOUNTED PRICING THAT WAS AVAILABLE AT THE TIME I REQUESTED. COULDNT ASK FOR ANYTHING BETTER on 30th Jul 2020

    7. If I could afford it.

      I would run this bolt in all my AR,s on 4th May 2020

    8. If I could afford it.

      I would run this bolt in all my AR,s on 4th May 2020

    9. Awesome

      Flawless and looks awesome love it will buy more on 19th Dec 2019

    10. slick as snot

      After shooting with this BCG I have had the song "Smooth Operator" stuck in my head! The mystic black looks even better than I anticipated and when they used the terms lipophillic and hydrophobic in the same sentence I knew this was the BCG for my build. Great customer service and they even included a sticker and small cleaning towel! on 29th Aug 2019

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