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. Only BCG‘S I’ll ever buy

      Bought one for my 300blk pistol, it literally is slicker than snot, flawless in every aspect, ordered 2nd one for 5.56 pistol, same deal, absolutely flawless, these BCG’s work and are everything they claim to be on 1st Jul 2020

    2. CC BCG is my first choice!!

      I've purchased two CC bcg so far and they never disappoint in quality and service. The first one was in rose gold for my F1 build last year and just received my second one in nickel boron for my aeroknox build. I highly recommend cryptic coatings. on 1st Jul 2020

    3. Mystic Silver BCG

      I just received my Mystic Silver BCG and I got to say it looks amazing. Shipping was fast and it was packaged very professionally(kids loved the mints). Nice upgrade to my .300blk build. Still need to put rounds through it but judging by the other reviews I expect it to run flawless. on 22nd Jun 2020

    4. A bit expensive but...

      TOTALLY WORTH IT! This is my second time getting one of these BCG and they are super smooth! Works flawlessly and easy to clean. I plan to do a video review on this after I shoot a few rounds through it. Last time I had the titanium one, which lasted me forever, so I need to see how this does compared to the titanium. Either way, I’m always choosing cryptic coatings. :) on 17th Jun 2020


      I purchased the left handed bcg in .223 with the mystic black coating. When i pulled it out of the packaging it felt slippery just in my hands. Was so excited i instantly threw it in my rifle, gave it just a quick spray of oil into the chamber and ran 200 rounds of steel case through it. Not one issue and it came out virtually spotless! So while pricy i do believe it was worth the money. Ps. The mints were a nice touch. on 16th Jun 2020

    6. Best coatings I’ve seen

      Just got the plain phosphate bcg and everything from packaging down to the coating were top notch. Definitely will be buying more on 15th Jun 2020

    7. BCG Rocks!

      better then my Nickle Boron I had in it from WMD. Clean up is easier and works just as advertised. Highly recommend. on 12th Jun 2020

    8. Damn that's one pretty bcg!

      Shipping was lightning fast, recieved my bcg before everything else on this build and still waiting for the rest of my parts so I cant input on function but couldn't ask for a better look on 11th Jun 2020

    9. Highest quality out there

      This bolt carrier group seems to be coated by Jesus Christ himself. It’s one of the most beautiful things I’ve ever seen. Quality is impeccable, seriously top of the line. Makes any rifle function like it’s covered in butter. on 11th Jun 2020

    10. Beautiful

      Ok so far so good just by touching and seeing it it's very beautiful a smooth but I haven't used the bcg yet idk how itll hold up yet to use and carb build up. on 10th Jun 2020