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 Batch Tested) and MPI (Magnetic Particle Inspected).
Complete Mil-Spec M-16 Bolt Carrier with Bolt Assembly HPT/MPI Tested:
- Mil-Spec BCG Machined from 8620 Aircraft Quality Steel and heat treated to 60-61 RC
- Mil-Spec Chrome Lined Carrier Interior
- Mil- Spec Chrome Lined Gas Key
- Key Staked with Grade 8 Screws, per Mil-Spec
- Mil-Spec Carpenter 158® Bolt w/ Spring and Ejector
- Tool Steel Extractor w/ Spring and viton O-ring
- Mil-Spec Firing Pin w/ Chrome Finish
- Mil-Spec Cam Pin
- Full Auto Carrier (Backward compatible with all semi-auto rifles)
- BCG Weight – 11.55 oz.
Zack (verified owner) –
Amazing bcg. Before this one I had the nickel boron bcg. It performed well, this was just a personal decision to get the mystic black. Mainly for the higher temp range and lubricity
Jon L (verified owner) –
All I can say is WOW. I ordered a “blemished” right hand mystic black and just the packaging alone before I unwrapped this beauty just oozed quality. I’m not really sure where there even is a blemish but this thing is SLICK. Puts my NIB BCGs to shame. I wiped off all the oil and the thing is still slipnslide slick. I can not wait to go and shoot this thing, I am very rarely impressed with gun parts these days (seen it all, all the same) but cryptic coatings is by far the best bcg ive seen. Hope it performs as well as it looks!
William (verified owner) –
Bought this a few months ago after seeing some videos of how it performed and cleaned up so easily. Like the others have said this thing is awesome I want another. I will be purchasing another when I can. Thanks Cryptic for a great product!
Isaac (verified owner) –
Buy with confidence, have had 9 of these in mystic black and 1 in the gold. Also picked one up for an ar9. You can’t find a blemish on them, ever in my 10. Highest quality bcg on the market, 3,500 rounds on my first one mostly suppressed with no lube or cleaning and zero malfunctions!!! They are all I put in my guns for the past 6 years. Gives that high quality smooth as glass feel to your rifle as opposed to the gritty machine mark scraping feel. As to the rifle with 3,500 rounds… bolt I had to brush off but everything else wiped right off. Thats with no lube and 2,500 of those were suppressed. Buy once cry once, you won’t regret it. Head and shoulders above the competition including the nitride and nickel boron offerings from makers like aero and Daniel defense and failzero. Don’t even waste your time with the mag phosphates. These are like geissele triggers, once you’ve seen the light you can’t go back to the dark. Also customer service has always been phenomenal. Wish they’d coat more things for AR in mystic black. 10 star worthy!
Gary Johns –
Mystic black is where it at! Over 2500 rounds and looks as good as it did the day I received it not a scratch any where. Wipe it down with a micro fiber rag and you can’t tell it from a brand new one.makes nib look and feel like a piece of sand paper.
Shawn (verified owner) –
Bought this mystic black BCG after reading some other online reviews… this BCG is amazing! Shot 250 rounds took it out of Springfield Saint, doesn’t look dirty at all. My daughter even said great job cleaning that! LOL! Told her it was just taken out. Quick wipe a little CLP and ready to go. I am retired military and would dread how dirty the bolt would get after range day. Now I’m looking forward to range day and cleaning! Cryptic Coatings have an excellent product!
I tell all my buddies about this BCG.
William H. (verified owner) –
This is a high quality slick BCG, I have the Mystic Gold on my 20″ and just got this Mystic Black for a 16″ I built. Both cycle fast, they are reliable, and so easy to clean. Unlike those parkarized ones when I was in the Marines where I would sit there trying to scratch carbon off with the end of the cleaning rod. These may be expensive but are worth it and the only brand I buy now.