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. Great BCG

      This was my first Cryptic BCG (Mystic Black). I shot 200 rounds through my 6.8 SPC. The function was flawless, and the cleaning after shooting suppressed was effortless. on 16th Dec 2019

    2. 3rd time buyer

      This is my 3rd Cryptic bcg. Mystic black, silver and now bronze. They r the best bcgs on the market. The finish is slick. After a long day of shooting, they wipe clean w a rag! Never had an issue w/ any of em. An extra bonus is they look Gucci! Awesome company to deal with. Summer is manning the phones, and will take great care of you! on 12th Dec 2019

    3. Gold BCG for my 6.5 Creedmoor build

      Beautiful and looks great. Seems to be well worth the price compared to others BCG that I have looked at. This one was purchased on a Black Friday sale and was received quickly via UPS. It was well packaged and built like a tank. Looking forward in finishing my build. I know this review might be premature since I didn't shoot it yet, but based purely on looks and aesthetics, it is top notch. If it meets my expectations in performance, I will buy a few for my already built AR15 platforms. Thanks Cryptic for such a nice piece. on 6th Dec 2019

    4. Just awesome mystic black

      I love this bolt carrier I have bought two of them already 308 and 223 best engine for a ar style platform on 4th Dec 2019

    5. Usual Great quality

      (This one is Mystic Blue)

      3rd Cryptic BCG, all 3 have been flawless. Finish is amazing, slick as hell, and it just looks good ;).
      on 4th Dec 2019

    6. Coating looks amazing.... have not shot yet.

      The bronze coating looks amazing. Unfortunately I haven’t tested the BCG yet, but looking forward to that. on 28th Nov 2019

    7. Rose gold BCG

      This item shipped very fast and customer service was great. The BCG looked exactly as pictured and you can really tell a difference between it and other BCG's. This one was for my wifes AR but I will be ordering another one for mine very soon. on 4th Nov 2019

    8. Slick

      As I noted other people saying, this bcg is absolute perfection. I am still waiting for the scope to arrive but hopefully in the next few days I will see how well it operates. It's probably the high point of my latest build. I topped it off with a POF tomahawk and love the feel. on 14th Oct 2019

    9. Looks incredible

      Haven’t been able to take it out yet, but this is easily the highest quality BCG I have ever purchased as far as fit and finish. on 14th Oct 2019

    10. Great Company

      I just had my first experience with Cryptic, it was great, I got the part sooner than I expected, the packaging was very nice, and the bcg I ordered was even nicer. The part works and looks great, I will be doing a lot more business with these guys. on 26th Sep 2019