Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Customer Reviews
Most Recent Reviews
Excellent BCGs by Mike, Verified Owner, April 26, 2024
The Treated Versions of the Cryptic BCGs are excellent BCGs. The BCG has a coating on it that helps keep it clean and facilities the movement of the BCG in the firing cycle. Brass consistently ejects at the 3:00 to 4:00 position. The coated versions ...
Read More...
Most Recent Reviews
This is the one you want. Pull the trigger! by cowflaps, Verified Owner, December 13, 2023
This is as much a piece of art as much as it is the heart of my 6.8 SPC hog gun. The fit and obviously the finish is beyond most all other BCGs, and the quality of the carrier steel (aircraft quality 8620 treated to 60-61 Rockwell) and bolt (Carpent...
Read More...
Most Recent Reviews
Im glad I shot the lock off my wallet by cowflaps, Verified Owner, December 6, 2023
Yes. It’s a beautiful BCG, with a perfect finish and flawless functionality. Headspace was perfect with my ARP 14.5 barrel and with the smaller bolt rim size I wanted to have something that I could have 100% confidence in. This particular finish loo...
Read More...
Read All 3 Reviews
Deal #3: Up to 15% OFF Firearm Parts
Gear Up With 10% Off Tons of Amazing Gear
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.
Show In Stock Only
8 Models Available

Show with deals only:

Coupon Available
Color
All
Finish
All
Additional Features
All
Search

Product Info for Cryptic 6.8mm SPC/.224 Valkyrie/.338 Spectre 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 6.8mm SPC/.224 Valkyrie/.338 Spectre Bolt Carrier Group (BCG) - Complete:

Manufacturer: Cryptic
Fabric/Material: Carpenter 158 Steel, 8620 Aircraft Quality Steel
Carrier Material: 8620 Steel
Bolt Material: Steel
Caliber: .338 Spectre, .224 Valkyrie, 6.8mm Remington SPC
Gun Make: AR Platform
Gun Model: M16, M4, AR-15
Hand: Ambidextrous
Weight: 11.55 oz
Included Accessories: Standard

Features of Cryptic 6.8mm SPC/.224 Valkyrie/.338 Spectre Bolt Carrier Group BCG - Complete

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

Package Contents:

  • Cryptic 6.8mm SPC/.224 Valkyrie/.338 Spectre 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

Cryptic 6.8mm SPC/.224 Valkyrie/.338 Spectre Bolt Carrier Group (BCG) - Complete Orderable Models

List of Orderable Models

  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Magnese Phosphate, CC-0804 , MPN: CC-0804 , Code: 4ZT-BCG-CRYC15-CC-0804
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Nickel Boron, CC-0805 , MPN: CC-0805 , Code: 4ZT-BCG-CRYC15-CC-0805
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Mystic Black, CC-0800 , MPN: CC-0800 , Code: 4ZT-BCG-CRYC15-CC-0800
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Black Nitride, CC-0806 , MPN: CC-0806 , Code: 4ZT-BCG-CRYC15-CC-0806
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Mystic Gold, CC-0801 , MPN: CC-0801 , Code: 4ZT-BCG-CRYC15-CC-0801
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Mystic Bronze, CC-0802 , MPN: CC-0802 , Code: 4ZT-BCG-CRYC15-CC-0802
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Mystic Silver, CC-0803 , MPN: CC-0803 , Code: 4ZT-BCG-CRYC15-CC-0803
  • Cryptic Bolt Carrier Group BCG - Complete 6.8mm SPC/.224 Valkyrie/.338 Spectre, Mystic Midnight, CC-0809 , MPN: CC-0809 , Code: 4ZT-BCG-CRYC15-CC-0809
Compare (0)