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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 BCG by Ed Gloccato, Verified Owner, December 15, 2024
Hands down the best BCG out there. The finish, and the coat this bcg has is ridiculous. Versatile. It has everything you need for any build.
2/2 found this helpful
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...
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3/3 found this helpful
Helpful Positive Review
I now own 3 of these BCG by Mr Orange, Verified Owner, June 27, 2025
I am also the proud owner of a Geissele BCG, Micro Best BCG and Tool Craft Nickel boron BCG. I love the cryptic coatings lubricity. I always find the Cryptic Coatings Nickel Boron Bolts on sale and put the others up for backups. The price is negligib...
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1/1 found this helpful
Helpful Positive Review
Epic BCG, a must have! by Brad, Verified Owner, November 1, 2025
Flawless BCG! Highly recommended! Thanks optic planet, stellar!
1/1 found this helpful
Helpful Positive Review
Nice BCG, good buy by HC, Verified Owner, December 3, 2025
Tested this in a 5.56 11.5 in suppressed gun. Had no problems cycling. It looks well made, and cleans easily. Nice purchase with the coupon.
1/1 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
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, 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 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 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 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 Black, CC-0100 , MPN: CC-0100 , Code: 4ZT-BCG-CRYC08-CC-0100
  • 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, Magnese Phosphate, CC-0104 , MPN: CC-0104 , Code: 4ZT-BCG-CRYC08-CC-0104

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-OT-C
  • 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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