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Questions & Answers
Are these bcg full auto?

Yes, their BCGs are built on a mil-spec M-16 pattern, so they are rated for full auto. The BCG itself however doesn't make the rifle fire full auto. You will need to follow all federal and local laws when it comes to having a full auto rifle.

by Mel, Verified Owner, December 12, 2025
Concerning the two options of left/right hand, the left hand BCG ver is for ARs machined for left eject? Expert Answer

Yes, left handed AR's have the ejection port and forward assist on the left side of the receiver. So a left handed bolt will have serrations on the left side to function with the forward assist. These Cryptic .223/5.56/.300 AAC Blackout BCGs are right hand models.

by Hunter, Gear Expert, July 13, 2022
Customer Reviews
Helpful Positive Review
Cryptic Black Nitride & Phosphate BCGs by johnchip, Verified Owner, June 24, 2025
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 chr...
Read More...
2/2 found this helpful
Helpful Positive Review
Cryptic 223/5.56 BCG by Pew Pew, Verified Owner, November 22, 2023
I bought the Cryptic 223/5.56 mystic silver chrome BCG. This BCG is amazing. The quality of this BCG is very nice. The cleanup is a breeze. It ran flawlessly. I would definitely recommend this BCG for anyone looking to upgrade or use in a new build.
5/5 found this helpful
Helpful Positive Review
Quality Product by Nate, Verified Owner, October 25, 2023
You just cannot beat cryptic coatings. You won't regret this product it will last a lifetime
3/3 found this helpful
Helpful Positive Review
Better than expected by Anthony, Verified Owner, December 6, 2024
I basically thought I would give this BCG a try based on the coating finish, although I was not sure about the BCG itself. I was not disappointed on either end. The finish is even slicker than I thought was possible. After installing it, it cycled sm...
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2/2 found this helpful
Helpful Positive Review
Flawless and well made by Patrick, Verified Owner, January 9, 2025
The BCG arrived quickly and was flawless. Fit and finish was perfect and it went right into my rifle and functioned without issue. Solid buy.
1/1 found this helpful
Helpful Positive Review
High Quality BCG and Not Bad Looking Either by MathGuy, Verified Owner, December 27, 2024
I am impressed with the looks and quality of this bolt carrier group. I wasn't sure I wanted to spend this much money but it looks really awesome in an all black gun. it's super easy to clean. just wipe it off. I would recommend it!
1/1 found this helpful
Read All 49 Reviews
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Product Info for Cryptic .223/5.56/.300 AAC Blackout Right Hand 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 .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete:

Manufacturer: Cryptic
Fabric/Material: Carpenter 158 Steel, 8620 Aircraft Quality Steel
Carrier Material: 8620 Steel
Bolt Material: Steel
Caliber: .300 AAC Blackout, 5.56x45mm NATO, .223 Remington
Gun Make: AR Platform
Gun Model: M16, M4, AR-15
Hand: Ambidextrous
Weight: 11.55 oz
Condition: New
Included Accessories: Standard

Features of Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group BCG - Complete

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

Package Contents:

  • Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group - Complete
  • Chrome Lined Gas Key
  • Key Staked with Grade 8 Screws
  • Bolt w/ Spring and Ejector
  • Tool Steel Extractor w/ Spring and viton O-ring
  • Firing Pin w/ Chrome Finish
  • Cam Pin

Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete Orderable Models

List of Orderable Models

  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Magnese Phosphate, CC-0104 , MPN: CC-0104 , Code: 4ZT-BCG-CRYC08-CC-0104
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Black Nitride, CC-0106 , MPN: CC-0106 , Code: 4ZT-BCG-CRYC08-CC-0106
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Nickel Boron, CC-0105 , MPN: CC-0105 , Code: 4ZT-BCG-CRYC08-CC-0105
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Midnight, CC-0109 , MPN: CC-0109 , Code: 4ZT-BCG-CRYC08-CC-0109
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Bronze, CC-0102 , MPN: CC-0102 , Code: 4ZT-BCG-CRYC08-CC-0102
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Silver, CC-0103 , MPN: CC-0103 , Code: 4ZT-BCG-CRYC08-CC-0103
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Gold, CC-0101 , MPN: CC-0101 , Code: 4ZT-BCG-CRYC08-CC-0101
  • Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Black, CC-0100 , MPN: CC-0100 , Code: 4ZT-BCG-CRYC08-CC-0100

Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Black Nitride, CC-0106 , MPN: CC-0106-EDEMO , Code: 4ZT-BCG-CRYC08-CC-0106-EDEMO-IN-D
  • USED Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Black Nitride, CC-0106, EDEMO1, Used, Condition Fair , MPN: CC-0106-EDEMO1 , Code: 4ZT-BCG-CRYC08-CC-0106-EDEMO1
  • USED, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Midnight, CC-0109 , MPN: CC-0109-EDEMO , Code: 4ZT-BCG-CRYC08-CC-0109-EDEMO-RE-B
  • USED, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Bronze, CC-0102 , MPN: CC-0102-EDEMO , Code: 4ZT-BCG-CRYC08-CC-0102-EDEMO-DF-D
  • DEMO, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Gold, CC-0101 , MPN: CC-0101-DEMO , Code: 4ZT-BCG-CRYC08-CC-0101-DEMO
  • DEMO, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Midnight, CC-0109 , MPN: CC-0109-DEMO , Code: 4ZT-BCG-CRYC08-CC-0109-DEMO
  • DEMO, Cryptic Bolt Carrier Group BCG - Complete, .223/5.56/.300 AAC Blackout, Right Hand, Mystic Black, CC-0100 , MPN: CC-0100-DEMO , Code: 4ZT-BCG-CRYC08-CC-0100-DEMO
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