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). 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 Cartridge: .300 AAC Blackout, 5.56x45mm NATO, .223 Remington Gun Make: AR Platform Gun Model: M16, M4, AR-15 Hand: Ambidextrous Included Accessories: Standard Condition: New Weight: 11.55 oz Bolt Material: Steel Carrier Material: 8620 Steel 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
6 reviews for Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) – Complete
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Jaymonrue –
This Cryptic Mystic Midnight BCG is by far the best I’ve tried, fit and finish is flawless, polished to perfection, fit my ProA2 side charging .223 Wylde with FA M4 lower. Bolt held up to 150rds tune in without a single issue. After a small gas block adjustment, spent round fall five feet to 4 o’clock in a two foot circular. As you know ammo is dirty these days, The Cryptic BCG is easy to clean, take apart, apply CPL, let sit 5mins, a soft brush on all parts, wipe clean with rag to paper towel and it’s spotless looked new again.
CCCitizen –
Great BCG, easy maintenance. And great staking. Not to expensive but not cheap by any means. Very slick bcg and I believe it's mpi and hpt as well. I would highly recommend the cryptic brand as a whole. The machining is also very uniform and high quality.
Nate –
You just cannot beat cryptic coatings. You won't regret this product it will last a lifetime
Rob –
Looks alone on this bad larry are stunning. Have about 300 rounds thru it so far and have yet to have any malfunction or ejection problems. Unbelievable easy to clean, i was shocked at first. All it took was a few wipes with a microfiber cloth and everything just fell off. Super slick action when compared to a stock ar bolt. Very noticeable difference after swapping.
Dan –
I bought the Mystic Black for my 300 Blackout AR-15. I wasn't sure it would be worth the cost of TWO Bolt carrier groups but suppressed shootign can get pretty messy pretty fast and having a quality BCG that cleans up with a paper towel is nuts. Definitely recommend
Pew Pew –
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.