Cryptic Coatings Mystic Black Bolt Carrier Group

Cryptic Coatings Mystic Black Bolt Carrier Group

Picture of a Cryptic Coatings Mystic Black Bolt Carrier Group .308 Winchester
Cryptic Coatings Mystic Black .308 Winchester Bolt Carrier Group

Cryptic Coatings Mystic Black Bolt Carrier Group .308 Winchester

Recently I was researching 308 Bolt Carrier Groups for our CT Other Light Weight AR-10 build and I decided to go with a Toolcraft BCG as that’s the brand BSF Barrels uses to headspace their Carbon Fiber Barrels like the one I bought for the aforementioned 308 build mentioned above. Unfortunately, I couldn’t locate the Toolcraft BCG I needed but some additional research lead me to Cryptic Coatings, specifically their Mystic Black Bolt Carrier Group.

I spent a decent amount of time reading Cryptic Coatings Mystic Black Bolt Carrier Group Reviews and decided I MUST buy one. Unfortunately, the Mystic Black in .308 Winchester was out of stock. I was bummed out but not deterred as Primary Arms let me backorder one BCG. I also decided to send an email to Cryptic Coatings. To my surprise, I received a call from the wonderful Karen H of Cryptic Coatings who graciously offered to save me one from the next run of .308 Mystic Black Bolt Carriers.

Three days later the Primary Arms order was delivered and about a month later Karen called me again to tell me my BCG had shipped. So yes I now own two very nice and expensive Cryptic Coatings Mystic Black Bolt Carrier Groups.

Available from Palmetto State Armory, and Primary Arms

Cryptic Coatings Bolt Carrier Group Mystic Black .308 Winchester

Founded in January 2014, Cryptic Coatings specializes in bolt carrier groups and BCG coatings. With an ever-expanding product line, their BCGs and coatings offer reduced friction, longer lifespans, and increased performance, backed by their lifetime warranty.

This Bolt Carrier Group includes a MIL-SPEC 8620 aircraft quality steel carrier with a shot-peened carpenter no. 158 steel bolt. The DPMS cut carrier is compatible with most DPMS pattern AR’s on the market and features a shrouded firing pin, a chrome-lined interior, and a properly staked, chrome-lined gas key secured with grade 8 fasteners. The bolt assembly includes a tool steel extractor with spring and Viton O-ring. A chrome-finished firing pin is also included.

Cryptic BCGs are finished in one of six different coatings, each offering reduced friction, increased performance, and greater wear resistance than that of a standard bolt carrier group.


Cryptic Coatings Bolt Carrier Features:

  • Mystic Black – .308 Winchester
  • Chemical vapor deposition coating
  • Coefficient of friction: 0.01
  • Hardness: 3000 Vickers
  • Maximum temperature: 1,000 degrees Fahrenheit
  • High pressure tested
  • Magnetic particle inspected
  • 8620 aircraft quality steel carrier
  • Heat treated to 60-61 RC
  • Chrome lined carrier interior
  • Chrome lined gas key
  • Gas key staked with grade 8 screws
  • Carpenter 158 steel bolt
  • Tool steel extractor
  • Viton O-ring
  • Chrome finish firing pin
  • MIL-SPEC cam pin


Cryptic Coatings Bolt Carrier Specifications:

  • Bolt Finish: Chemical Vapor Deposition
  • Bolt Material: Carpenter 158 Steel
  • Brand: Cryptic Coatings
  • Caliber Gauge: .308 Win
  • Carrier Finish: Amorphous Carbon CVD
  • Carrier Material: 8620 Carpenter Steel
  • Carrier Style: DPMS Pattern Carrier
  • High Pressure Tested: High Pressure Tested
  • Magnetic Particle Inspect: Magnetic Particle Inspected
  • Platform: AR-308, AR-10, 308AR