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Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete Up to $14.25 Off Plus Coupon Available w/ Free Shipping — 9 models

Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
1 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
2 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
3 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
4 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
5 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
6 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
7 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700
8 of 16 images
Cryptic Bolt Carrier Group - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
9 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
10 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
11 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
12 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
13 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
14 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
15 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700
16 of 16 images
Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700

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Questions & Answers
does the 7.62x39 nitride bcg also have the chrome linning for both the gas key and inside the carrier where the bolt rides? Expert Answer

The Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group Nitride model is not listed as having the Chrome lined finish on the inside by the manufacturer.

by Hunter, Gear Expert, March 1, 2023
See 1 More Answer
Can this be used in a right side charging Gen 2 bear creek arsenal upper chambered in 7.62x39mm? Expert Answer

The Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group would not be compatible with your BCA 7.62x39 upper. There would be no way to charge the rifle in order to load the first round into the chamber.

by Ethan, Gear Expert, February 13, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
7.62x39 bolt carrier group by Jacob, Verified Owner, August 24, 2024
Put the bcg in my own AR build and it worked seamlessly.
2/2 found this helpful
Helpful Positive Review
cryptic bolt carrier group by Jacob, Verified Owner, August 31, 2024
This fit perfect in my recent most recent AR build and looks great as well!
2/2 found this helpful
Read All 2 Reviews
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Product Info for Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete

Coated Bolt Carrier Group BCG (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. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected).image

Specifications for Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete:

Manufacturer: Cryptic
Fabric/Material: Carpenter 158 Steel, 8620 Aircraft Quality Steel
Carrier Material: 8620 Steel
Bolt Material: Steel
Caliber: 6.5mm Grendel, 7.62x39mm
Gun Make: AR Platform
Gun Model: M16, M4, AR-15
Hand: Ambidextrous
Weight: 11.55 oz
Included Accessories: Standard

Features of Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group BCG - Complete

  • Reduced Carbon Fouling;
  • Easier Cleaning;
  • Full Auto Carrier (Backward compatible with all semi-auto rifles)

Package Contents:

  • Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group - Complete
  • Gas Key
  • Key Staked with Grade 8 Screws
  • Bolt w/ Spring and Ejector
  • Extractor w/ Spring and viton O-ring
  • Firing Pin
  • Cam Pin

What firearm models does the manufacturer say Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete is compatible with?

The manufacturer suggests that Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete is compatible with AR-15, M4, M16

Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete Orderable Models

List of Orderable Models

  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706 , MPN: CC-0706 , UPC: 3581872 , Code: 4ZT-BCG-CRYC13-CC-0706
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704 , MPN: CC-0704 , UPC: 3581858 , Code: 4ZT-BCG-CRYC13-CC-0704
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706 , MPN: CC-0706-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0706-EDEMO-RE-B
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705 , MPN: CC-0705 , Code: 4ZT-BCG-CRYC13-CC-0705
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Gold, CC-0701 , MPN: CC-0701 , Code: 4ZT-BCG-CRYC13-CC-0701
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709 , MPN: CC-0709 , Code: 4ZT-BCG-CRYC13-CC-0709
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Bronze, CC-0702 , MPN: CC-0702 , Code: 4ZT-BCG-CRYC13-CC-0702
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Silver, CC-0703 , MPN: CC-0703 , UPC: 3581827 , Code: 4ZT-BCG-CRYC13-CC-0703
  • Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700 , MPN: CC-0700 , Code: 4ZT-BCG-CRYC13-CC-0700

Cryptic 6.5mm Grendel/7.62x39mm Bolt Carrier Group (BCG) - Complete Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704 , MPN: CC-0704-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0704-EDEMO-SC-C
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706 , MPN: CC-0706-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0706-EDEMO-SC-C
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Black Nitride, CC-0706 , MPN: CC-0706-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0706-EDEMO-RE-C
  • DEMO, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Magnese Phosphate, CC-0704 , MPN: CC-0704-DEMO , Code: 4ZT-BCG-CRYC13-CC-0704-DEMO
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Nickel Boron, CC-0705 , MPN: CC-0705-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0705-EDEMO-IN-C
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Midnight, CC-0709 , MPN: CC-0709-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0709-EDEMO-RE-C
  • USED, Cryptic Bolt Carrier Group BCG - Complete, 6.5mm Grendel/7.62x39mm, Mystic Black, CC-0700 , MPN: CC-0700-EDEMO , Code: 4ZT-BCG-CRYC13-CC-0700-EDEMO-RE-B
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