Coated Bolt Carrier Group

Coated Bolt Carrier Group - BLEMISHED

Take advantage of our attention to detail.... 15% off in fact. These blemished bolt carrier groups didn't meet our expectation therefore we are passing some savings on to our customers.

Need help on a coating?


The fit and function is 100% true to our normal bolt carrier groups, these simply just have some minor cosmetic blemishes. They also carry the same lifetime warranty for form, fit and function as our non-blemished BCG's.

15% off has already been applied to the pricing on this page.

Blemishes may include one or some of the following:

  • Poor logo marking, or missing logo.
  • Imperfect polishing, contained mostly on the inside of the carrier, causing a non mirror-like finish.



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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  • Product Reviews


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    1. amazing product

      when received in the mail , your in awe at the product . you cannot see the "blemish" anywhere . for the money you save , id buy blemished all day long. thank you again for a great product . on 15th Jun 2019

    2. Almost thought they sent me a new one.

      Ordered a blem BCG and took two of us searching with bright lights to find what we thought may have been blems. To be honest I feel like it is as good as new. Love the customer support and delivery times. on 5th Jun 2019

    3. Hard to Find Blem

      I own several Cryptics and this one is as good as the regular stock. The finish may not be up to the usual standard but isn't obviously flawed. This one went into my LR308 SPR and function was flawless as usual. on 5th Jun 2019

    4. Amazing

      Does not scratch, gall, mark minimal lubrication, finish is amazing...literally taking a paper towel to clean off all carbon after 500 rounds fired! Amazing!!! on 4th Jun 2019

    5. Love these guys

      I have four BCGs from cryptic coatings and all of them are flawless; including this one, which was sold to me as a blem. My first build has a cryptic NiB bcg/bolt with more than 12k rounds though it and no issues at all. Cryptic Coatings' products are now utilized in my duty rifle, as well. on 4th Jun 2019

    6. Not bad

      Seems like a quality BCG. I was expecting a bit more of a polished finish but as long as it cleans up good and runs smooth I'm happy. on 4th Jun 2019

    7. 10/10

      Got the mystic silver one. The blem was hard to find, but I guess that if you paid the normal money for a bcg and found a blemish, one might be upset so it's understandable. The blem affects no function and it's not visible from the outside when installed in a firearm. Works as intended. I honestly couldn't tell the difference in the smoothness between it and the mystic black I have. That is to say, if you're torn between the two but want to flex with silver, go silver. on 30th May 2019

    8. Beautiful product!

      I ordered a "blemished" Mystic Bronze, and it looks just as good in person as the pictures on the website. I can't even see the imperfection that they're calling a blemish. on 8th Apr 2019

    9. Wheres the blem???

      Ordered a "blemished" mystic black bcg and it took forever to find the "blemish". Only with a flashlight. Looking down the inside of the rear of the carrier can you see it. Absolutely recommend this bcg, and purchasing more for my next builds. Costing is extremely slick, cycles smooth as can be and even after a few mag dumps it was cool to the touch. Outstanding workmanship and all around great experience dealing with cryptic coatings. on 8th Apr 2019

    10. Amazing products. Love

      I have been researching and wanting to buy these bcg but never convince myself that I could pay $300+ for a bcg. However, I found the blemished section and I fell in love. These bcg rock, their customer service rocks and I am a very happy consumer. Their agent who I spoke with was helpful and very accommodating. Thanks so much!! on 4th Apr 2019