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Reviews & Ratings for Cryptic 6.5mm Grendel II Bolt Assembly - Complete — 12 reviews

(12 reviews)
Cryptic 6.5mm Grendel II Bolt Assembly - Complete
Cryptic 6.5mm Grendel II Bolt Assembly - Complete
As Low As $65.55 Save Up to $6.00
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Most Helpful Positive Review Exactly what I needed
Had an extra bcg and wanted to build a 6.5 Grendel. This fit right in to replace the 556 Bolt. No issues, installed perfectly and easily.
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well built

by packfan, Verified Owner from WI, United States Written on March 29, 2026
Fit & finish is excellent. Has held up well. So far it has 800 rounds through it without failure.
Would recommend: Yes
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Quality Product

by Mark, from TX, United States Written on February 19, 2026
Very good quality part and good shipping and customer service.
Would recommend: Yes
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6.5 Grendel bolt assembly !

by Bob Anderson, Verified Owner from TX, United States Written on July 22, 2025
Optics Planet is my go to sight for all outdoor activities!
The 6.5 Grendel bolt assembly will finish up the build !!!
Would recommend: Yes
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6.0 Arc upgrade

by MikeJ, Verified Owner from IN, United States Written on July 1, 2025
Bolt is of excellent quality. Very good machine work. Used to upgrade a 223 rem bolt and carrier for a 6.mm ARC new build. Has been working great with sub moa accuracy.
Best Used for:
  • 6.5 grendal
Would recommend: Yes
Was it helpful to you? Yes | No
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Bolts 6.5 grendel

by Don, Verified Owner from OR, United States Written on April 9, 2025
Good product Good price Good service happy with my purchase
Would recommend: Yes
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Cryptic 6.5mm Grendel II Bolt Assembly

by Bulldoc, Verified Owner from LA, United States Written on March 7, 2025
I bought this to replace a broken extractor on a Alexander Arms 6.5 Grendel. It’s been installed and taken to the range shooting approximately 20 rounds and it performed flawlessly. Would highly recommend this item!
Would recommend: Yes
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High Quality Bolt

by DougsAR838, Verified Owner from TN, United States Written on October 10, 2024
I purchased this bolt assembly for my 6.5 Grendel type 2 build. It’s of the same quality as my other Cryptic bolt carrier groups. I ALWAYS verify the headspace on all my builds. This bolt passed with no issues. This bolt is everything that it’s advertised to be. I highly recommend Cryptic products. You can buy with confidence.
Pros:
  • Very high quality
Cons:
  • None
Best Used for:
  • 6.5 Grendel type 2 ONLY.
Would recommend: Yes
Was it helpful to you? Yes | No
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Excellent!

by Judd, Verified Owner from PA, United States Written on July 14, 2024
Paired this Cryptic Grendel bolt with an 18" Faxon barrel, a Superlative Arms gas piston, and stuck it all in a Gibbz G4 side-charger. Flawless function with initial test firing. I absolute recommend it.
Pros:
  • works
Cons:
  • None
Best Used for:
  • Duh!
Would recommend: Yes
Was it helpful to you? Yes | No
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cryptic 6.5 grendel ll bolt

by Justin T, Verified Owner from WV, United States Written on May 25, 2024
All I needed for my conversion. So I got it cleaned n lubed it threw it in the gun n it worked.
Would recommend: Yes
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Cleaning brushes and AR bolts

by Dharris, Verified Owner from KY, United States Written on February 19, 2024
Good quality,all works as intended, good price! Optics planet all ways have good deal and discounts I have saved a lot of money over the past few years by buying from them, and the have allways had goo customer service.
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.