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Cryptic 6.5mm Grendel II Bolt Assembly - Complete Up to $6.00 Off and Coupon Available w/ Free S&H — 8 models

Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Magnese Phosphate, CC-BAC-1204
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Black Nitride, CC-BAC-1206
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Nickel Boron, CC-BAC-1205
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Bronze, CC-BAC-1202
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Silver, CC-BAC-1203
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Midnight, CC-BAC-1209
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Gold, CC-BAC-1201
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Magnese Phosphate, CC-BAC-1204
1 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Magnese Phosphate, CC-BAC-1204
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Black Nitride, CC-BAC-1206
2 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Black Nitride, CC-BAC-1206
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Nickel Boron, CC-BAC-1205
3 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Nickel Boron, CC-BAC-1205
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Bronze, CC-BAC-1202
4 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Bronze, CC-BAC-1202
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Silver, CC-BAC-1203
5 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Silver, CC-BAC-1203
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Midnight, CC-BAC-1209
6 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Midnight, CC-BAC-1209
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Gold, CC-BAC-1201
7 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Gold, CC-BAC-1201
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200
8 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200
9 of 9 images
Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200

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Questions & Answers
Will this work with 6mm ARC too?

Yes, along with 22 ARC and 338 ARC as well. It will only work on Type II barrels for 6.5 Grendel; Type I uses the same bolt as 7.62x39.

by chris, Verified Owner, June 3, 2025
can this be used with 7.62X39 AR15 builds too? Expert Answer

No you will need the bolt at the link below.
https://www.opticsplanet.com/cryptic-6-5mm-grendel-7-62x39mm-bolt-assembly-complete.html

by Hunter, Gear Expert, January 10, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Most Recent Reviews
well built by packfan, Verified Owner, March 29, 2026
Fit & finish is excellent. Has held up well. So far it has 800 rounds through it without failure.
Most Recent Reviews
Exactly what I needed by Chili, Verified Owner, March 3, 2026
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.
Most Recent Reviews
Quality Product by Mark, February 19, 2026
Very good quality part and good shipping and customer service.
Most Recent Reviews
6.5 Grendel bolt assembly ! by Bob Anderson, Verified Owner, 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 !!!
Most Recent Reviews
6.0 Arc upgrade by MikeJ, Verified Owner, 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.
Most Recent Reviews
Bolts 6.5 grendel by Don, Verified Owner, April 9, 2025
Good product Good price Good service happy with my purchase
Read All 12 Reviews
Eligible models will have a savings offer. Apply coupon and add the item to your cart for savings on that select model! Limited time only. Cannot be combined with other promotions or offers. See promotion details.
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Product Info for Cryptic 6.5mm Grendel II Bolt Assembly - Complete

Bolt assembly machined from either Mil-Spec Carpenter 158 steel, shot peened for increased strength per Mil-Spec, includes Mil-Spec 4140 billet tool steel extractor w/ spring and viton o-ring, Mil-Spec ejector and spring. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Comes Assembled.image

Specifications for Cryptic 6.5mm Grendel II Bolt Assembly - Complete:

Manufacturer: Cryptic
Finish: Chrome Plated
Fabric/Material: 4140 Billet Tool Steel, Carpenter 158 Steel
Carrier Material: 8620 Steel
Bolt Material: Steel
Caliber: 6.5mm Grendel II
Gun Make: AR Platform
Gun Model: AR-15
Hand: Ambidextrous
Weight: 2 oz
Included Accessories: Standard

Package Contents:

  • Cryptic 6.5mm Grendel II Bolt Assembly - Complete
  • Bolt
  • Tool Steel Extractor Assembly (spring with viton insert pin extractor)
  • Ejector Assembly (ejector spring roll pin)
  • Gas Rings - Set of 3

What firearm models does the manufacturer say Cryptic 6.5mm Grendel II Bolt Assembly - Complete is compatible with?

The manufacturer says that Cryptic 6.5mm Grendel II Bolt Assembly - Complete is compatible with AR-15

Cryptic 6.5mm Grendel II Bolt Assembly - Complete Orderable Models

List of Orderable Models

  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Magnese Phosphate, CC-BAC-1204 , MPN: CC-BAC-1204 , Code: 4ZT-BCG-CRYC06-CC-BAC-1204
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Black Nitride, CC-BAC-1206 , MPN: CC-BAC-1206 , Code: 4ZT-BCG-CRYC06-CC-BAC-1206
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Nickel Boron, CC-BAC-1205 , MPN: CC-BAC-1205 , Code: 4ZT-BCG-CRYC06-CC-BAC-1205
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Bronze, CC-BAC-1202 , MPN: CC-BAC-1202 , Code: 4ZT-BCG-CRYC06-CC-BAC-1202
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Silver, CC-BAC-1203 , MPN: CC-BAC-1203 , Code: 4ZT-BCG-CRYC06-CC-BAC-1203
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Black, CC-BAC-1200 , MPN: CC-BAC-1200 , Code: 4ZT-BCG-CRYC06-CC-BAC-1200
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Midnight, CC-BAC-1209 , MPN: CC-BAC-1209 , Code: 4ZT-BCG-CRYC06-CC-BAC-1209
  • Cryptic Bolt Assembly - Complete, 6.5mm Grendel II, Mystic Gold, CC-BAC-1201 , MPN: CC-BAC-1201 , Code: 4ZT-BCG-CRYC06-CC-BAC-1201
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