Cryptic Coatings .308 Win Bolt Carrier Group - Mystic Black
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 ARs 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.
- 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
Ratings & Reviews
Well worth the price!
by Travis -
I purchased this for a 16” Aero M5 build and I must say this is an outstanding BCG and the finish is superb! The coating is so slick that during opening the box it almost slid right out through my hand onto the floor.
<br> This bolt cycled flawlessly through the first 500 rounds of 2 types of ammo and the bolt easily wiped clean without the use of any cleaner or scrubbing. There were no signs of wear anywhere on the coating. This definitely out performs a competitors nickel boron coated BCG that I have in another M5 build and I will definitely be purchasing another one for an AR15 build.