Coated bolt carrier group (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; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin.
HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).
Complete Mil-Spec M-16 Bolt Carrier with Bolt Assembly HPT/MPI Tested:
This BCG is a thing of beauty. I haven't had a chance to test it yet as my build is still in progress. Gary Toth on 8th Aug 2018
So far so good. The coating is flawless, looks awesome and its nice and slick. Gas key has good staking, and the bolt matched up perfect with my faxon barrel. I ran about 60 rounds through it so far and it seems to work good. Randall on 3rd Aug 2018
I waited to write this until I had the chance to run it through a few hundred rounds. This is slickest, easiest to clean BCG I have ever had. You might be deterred by the price but the quality and uniformity of the coating are exceptional. This blows the nickel boron and nitride finishes out of the water. If I build another rifle this will be the BCG I purchase, may replace the others with this. Stephen H on 11th Jul 2018
These are all I use on every build now. I have never had a single issue with them and the customer service is great. There is no scraping involved when cleaning one of these as the carbon wipes right off. I've tried a lot of high end carriers but Cryptic tops them all. Alan Colsden on 9th Jul 2018
Aesthetically pleasing, mind blowingly simple to clean, and my father who is in engineering and chemicals was blown away by the workmanship and formula at play here. Will be the only BCG I buy from here on out. High premium is absolutely worth it. Luke on 2nd Jul 2018
I purchased a Cryptic Coating complete bolt carrier group. Initial quality was superb and the mystic black coating was smooth as snot. During the range session, the bcg ran flawlessly and felt smooth in my DDm4v11. After 100 rounds, the bolt carrier looked spotless and cleaning was a breeze. My only complaint is a little bit of the coating did chip off near the base of the carrier where it meets the m4 feed ramp. I figured this area would wear over time. Dan Clemens on 2nd Jul 2018
I ordered this bcg for my first build. It came super fast and even had some goodies inside. (Decal and lens wipe both with the cryptic emblem. And some mints) The bolt functions flawlessly and works very well. Very happy with it. I would definitely do business with them in the future. Chandler on 29th Jun 2018
This is my first mystic black and I am amazed at the finish and how well it cleans up! I have used many of your QPQ finished BCGs and this was by far the most costly, but I am never disappointed! Unknown on 25th Jun 2018
We are an advanced firearm manufacturer and have tested all
The best bolts. There is nothing better than Cryptic! World class customer service, lightning fast Shipping and the very best quality and aesthetics. Thank you guys so much for all you do! Oregon Bros ammo on 22nd Jun 2018
Finish is super slick and very high quality. Highly recommended. I'll be using these in my builds going forward. Unknown on 18th Jun 2018