FailZero EXO Coated 7.62x39mm Bolt Carrier Group

Manufactured by Fail Zero
SKU: FZ-7.62X39-01-NH
MPN: FZ-7.62X39-01-NH
Manufactured by Fail Zero
3 Reviews

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



This 7.62x39mm Bolt Carrier Group is fully assembled and drop-in ready for most MIL-SPEC upper receivers. All critical parts are coated with EXO Nickel Boron technology providing permanent dry lubricity, extreme durability and increased wear and corrosion resistance. This patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.

NOTE: In spite of the included Enhanced Firing Pin, light strikes may still occur when shooting TulAmmo or Golden Tiger ammunition due to excessive primer depth.

  • 7.62x39mm compatible
  • MIL-SPEC length bolt 
  • M16 cut bolt carrier
  • Black Rifle Arms Enhanced Firing Pin 
  • Magnetic particle inspected
  • Live fire tested
  • EXO Nickel Boron treated parts include:
  • Bolt, extractor, bolt carrier, cam pin, and carrier key

Includes a reliable MIL-SPEC length bolt and a longer length Black Rifle Arms Enhanced Firing Pin for better performance without over penetration. The extractor includes a heavy spring, silicone insert, and O-ring for improved extraction tension. Not all Nickel Boron is created equal and FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option, you can depend on FailZero.
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Bolt FinishNickel Boron
Bolt MaterialCarpenter 158 Steel
BrandFail Zero
Caliber Gauge7.62X39mm
Carrier FinishNickel Boron
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedLive Fire Tested
Magnetic Particle InspectMagnetic Particle Inspected

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

3 reviews

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Pretty good.

by -

great quality, havent cleaned yet. ran very well. decent price

Fail Zero rules!


I have a Fail Zero BCG at the heart of my .458 socom build and I couldn’t be happier. I’ve not had a single malfunction with it. In my haste to shoot it, I forgot to lube it and the upper receiver. Functioned flawlessly, I’m completely satisfied.

Great for 7.62x39 uppers.

by -

I have built 4 7.62x39 uppers with this BCG with 100% reliability through thousands of rounds of steel cased Russian ammo. This is the only BCG I will use for my x39 builds. Excellent product!