FailZero EXO Coated AR-15 Bolt Carrier Group

Manufactured by Fail Zero
SKU: 009-FZAR15-01-NH
MPN: FZ009-FZAR15-01-NH
Manufactured by Fail Zero
68 Reviews

In Stock

Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



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. The AR-15 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: BCG may ship with either a dark FailZero logo or a subdued lasered FailZero logo.

  • AR-15 cut carrier
  • Magnetic particle inspected
  • Live fire tested
EXO Nickel Boron treated parts include:
  • Bolt, extractor, bolt carrier, cam pin, carrier key, and firing pin
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Bolt FinishNickel Boron
Bolt MaterialCarpenter 158 Steel
BrandFail Zero
Caliber Gauge5.56 NATO
Carrier FinishNickel Boron
Carrier Material8620 Carpenter Steel
Carrier StyleAR-15 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

Great BCG


Upon inspection I was very impressed. My company owns a metal fabrication shop which produces products for the wireless communications market so I have an in-depth knowledge of quality fabrication. There were almost no tooling marks with the exception of just a few on the bolt lugs but the rest of the BCG was perfect. Very nice NiB finish making for a super smooth surface. Cycled flawlessly in my AR and as a result I ordered one for my wife's AR. Primary Arms delivered fast.

Excellent BCG!


Had this in my rifle for about a month now absolutely love it! Great looking and great finish! Very easy to clean also. Primary Arms had it shipped the day after i ordered it. Truly a 5 star company. I love that they take the time to talk with you and answer all questions without seeming like they are trying to hurry and get off the phone.

Great Product


Able to shoot without any problems. Runs flawlessly. Pleasure ordering from Primary Arms.

Love this BCG


Excellent product and finish.. So easy to clean and functions flawlessly so far. Always love doing business with Primary Arms. Truly a 5 star company.

100 rounds, stained BCG, residue does not simply wipe off!!

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Product had a great finish. Super smooth and it actually felt like there was already lube on it, but there wasn’t. I ran 100 rounds of Fiocchi through this BCG. Took the BCG home excited to wipe the grime right off. This was not the case. The coating was stained and the carbon did not just wipe off. Especially off of the bolt. I will not buy this product again. Nor can I recommend it. It did run flawlessly for 100 rounds. But cleaning was just the same compared to my other BCG without a Nib coating. Glad I got it on sale. If I would of paid full price for this product, I would definitely be upset.


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had to stop using it because the carbon stained it so bad the lube didnt seem to work at all anymore within a few months use. Took for ever to clean and basic cleaners seem to make the finish worse and eat threw it. So now it sits in my junk pile. Need to contact company to see what they can do about it...

Perfect BCG

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I'm currently running 3 of these BCGs in different builds and they run flawlessly and never have had any issues and cleaning is a breeze!

Very nice piece

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Dropped right into my Radical Firearms 5.56 upper. You can tell it is well built. Looks pretty sweet too which is an added plus. I haven't shot with it yet, but I've read the reviews that mention issues with carbon buildup, we'll see what happens there but I'm optimistic