Cryptic Coatings 5.56 NATO AR-15 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 M16 cut carrier is compatible with most AR-15s 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 - 5.56 NATO
- Chemical vapor deposition coating
- Coefficient of friction: 0.01
- Hardness: 3000 Vickers
- Maximum temperature: 1,000 degrees Fahrenheit
- M16 cut bolt carrier
- 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
- Weight: 11.55 oz
Ratings & Reviews
It's not snake oil
by Zachary -
I love mine. I can clean off all the carbon with a dry paper towel. This thing is sweet, and it almost slipped out of my hand the first time I picked it up. It's super slick and works flawlessly.
Pricey but worth it
I purchased a blemish black mystic bcg from cryptic coatings a few months ago (not from primary arms) and although these are a little pricey they are top notch. The coating is way slicker than nickel boron and so far i have no wear marks/points on the bcg.