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Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete
As Low As $123.50 Save Up to $14.00
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Most Helpful Positive Review Cryptic Black Nitride & Phosphate BCGs
I've purchased Cryptic's Black Nitride and Manganese Phosphate BCGs and for the price you get a really good mil-spec BCG. The black nitride BCG is super slick, easy to clean and runs great, however, the carrier and the carriers gas key don't come chrome lined. The phosphate version does come with a ...
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Most Helpful Negative Review Decent BCG
Bolt came packaged jn cheap clear plastic clam shell similar to packaging for a cheap knife you’d find on the end isle at an outdoor outfitters. Bolt is very stiff inside carrier. Is difficult to remove for dissemble and bolt literally has to be slammed back into carrier to reassemble. Staking on ga...
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Excellent!!

by William Simmons, Verified Owner from AZ, United States Written on May 28, 2026
This thing is slick, very slick. The bolt functions just perfectly, as I expected it to. I was really happy with the clean up. Just wipe everything down and dry it up. So much easier to clean than anything else I’ve had. The carbon comes right off. Excellent!
Pros:
  • smoother action
  • Super slick
  • Ease of cleanup
Cons:
  • price
Best Used for:
  • Sending Freedom Seeds!
Would recommend: Yes
Was it helpful to you? Yes | No

best bcg out there

by ronnie, Verified Owner from FL, United States Written on May 28, 2026
I have cryptic Bcg on all my rifles. No brainer new build would have this one on there. As described and worth the money.
Would recommend: Yes
Was it helpful to you? Yes | No

stunning BCG

by B from SoCal, Verified Owner from CA, United States Written on May 23, 2026
This is now the second bcg I have purchased from cryptic. The first one was all it took to win me over! I got the ar10 cryptic for my 308 and after 500 rounds it operated flawless and cleaned up with nothing more than some clp and a rag to wipe it clean!
Therefore leading to this purchase for my new Daniel Defense build
Would recommend: Yes
Was it helpful to you? Yes | No

expensive but shiny

by tb91, Verified Owner from KY, United States Written on May 20, 2026
This bcg is awesome I now own 3: two 5.56 and one .308 mystic bronze midnight and silver respectively they are all just simply outstanding they cycle so smoothly. Now pair them with a jp silent capture spring system as I have done and you have a smooth operating, brass slinging sick nasty looking firearm that gently kisses your shoulder with recoil while reminding everyone around you like customizing your guns just a bit too much
Would recommend: Yes
Was it helpful to you? Yes | No

Open box special

by Ed, Verified Owner from NC, United States Written on March 31, 2026
Buy this bcg, it's well made and has a high quality finish. The coating is top notch, machining and staking is well done. The one I ordered was a display open box special. Absolutely no complaints.
Pros:
  • Finish , feel and funstions as it should
  • Coating all even no missed spots
Cons:
  • None
Best Used for:
  • self / home defence
  • ar 15
Would recommend: Yes
Was it helpful to you? Yes | No

Smooth bolt

by Sheldon Frederick, Verified Owner from PA, United States Written on March 27, 2026
Nice quality runs very smooth and runs faster than my stock bolt I would buy again.
Would recommend: Yes
Was it helpful to you? Yes | No

Great product Cryptic BCG NiB

by Daith, Verified Owner from GA, United States Written on March 25, 2026
Well manufactured. From the gas key staking to bolt everything looks great and its well made. Shot some rounds with the BCG and worked flawlessly. That being said so far its working great. Going to the range to fully break it in.
Would recommend: Yes
Was it helpful to you? Yes | No

ar15 nickel boron bcg

by maz, Verified Owner from WI, United States Written on March 23, 2026
It works great nickel boron stays clean and when it’s time to clean it it wipes right off
Would recommend: Yes
Was it helpful to you? Yes | No

my 5th Cryptic BCG so far, and love them all

by Mark Kuehn, Verified Owner from SC, United States Written on March 21, 2026
I've built for myself, and my fiance, 4 5.56 Ar15's, and one SBR .300 BLACKOUT, in which every single one has a full mass cryptic BCG (RANGING IN COLORS FROM GOLD TO MYSTIC MIDNIGHT). I've also purchased 2 low mass Cryptic BCG (Gold and Bronze) for my fiance and I in case we would like to mess around one day at the range and try to dial in two of our Ar's as a light mass build w our AGB in bleed off mode. There is literally no other BCG on this planet that I've come across that is superior to these, and I mean literally nothing is better. BCM (Bravo Company) makes a wonderful bolt, same with Rosco (Bloodline), and of course the JP enterprises and Geissele are top contenders as well, but still don't have the same awe factor and buttery, silky smooth action as these cryptic bcg's. They are out of the box, no lubrication, more slick and have a friction coefficient so low that without lube they are more silky than any other bcg well oil'd. Now, Bcm bcg's have a proven duty related track record, and I love those ones as well, but still had to go with the Cryptic for ease of cleaning and how amazingly smooth the action is.
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent BCG

by LIKEWISE, Verified Owner from TX, United States Written on March 16, 2026
BCG looks flawless, looking forward to running it in my 300 SBR build!
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.