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.

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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. Just plain amazing!!!

      These blemished BCGs still exceed the best of what you'd get elsewhere. You will not be able to find the blemish. I have looked at mine forever and still can't find it. That mystic bronze pops too and is super smooth. Cryptic is my new go to.

      FYI delivery was very quick as well.
      on 3rd Apr 2020

    2. Gorgeous...

      The guys at Cryptic must have the most insanely high standards when it comes to their stuff. The "blemished" (I can't find a thing wrong at all) BCG is pristine. Not only that but the coating is GORGEOUS. It's a shame nobody will ever see it. I'll never use another BCG from anyone else. on 9th Mar 2020

    3. Slick as snell shit!!!

      Have two bcd from Cryptic. I run suppressors with everything and it is the easiest to clean! No solutions are required but just a few wipes. U won’t regret purchase! on 26th Feb 2020

    4. Its all good...if you can afford it

      i have had dozens of bolts from various companies and few match the finish quality of these products. With these bolts at the higher end of the price spectrum i expect exceptional costumer service and this company seems to on target.
      overall, i feel the AR bolt market is very competitive if not even saturated but from what i can tell this company is making quality "high-end" parts that are great if you can afford them and if the company can withstand the competition.

      from what i can tell your getting a great product, but i expect that at this price point.
      on 11th Dec 2019

    5. LH BCG

      Bought it for my friend. Excellent. I'm glad i picked this up. Thanks. on 10th Dec 2019

    6. Can't go wrong..

      What else can you say. They are the best of the best. I want more... on 9th Dec 2019

    7. What Blemish? Amazing Quality Product

      Recieved this product and I honestly don't notice any blemish at all. I'm really curious to see what the companies standards if the product I purchased looked like there was nothing wrong with it. The shipping was really quick especially for Black Friday. on 6th Dec 2019

    8. Extremely slick and shiny BCG

      I ordered the mystic bronze coated BCG and was impressed enough to order a second one in mystic blue. The blemish on mine was a very small, minor rough spot in the coating along the top edge of the hollow section, above the forward assist serrations. This part doesn't contact the receiver, and the blemish doesn't affect performance in any way, so 5 stars from me. on 4th Dec 2019

    9. Blemished 7.62 bolt carrier looks flawless

      I bought my blemished Mystic Black large AR bolt carrier figuring it would have the slick coating and was OK with cosmetic flaws. It is absolutely flawless and I could not find the blemishes. on 4th Dec 2019

    10. Great BCG

      Second bolt carrier group I’ve purchased from cryptic... love them ... not sure why they are marked as blemished... easy to clean... fast running on 3rd Dec 2019