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 service!


Ordered and received in less than a week on Thanksgiving week. Awesome product!

new to NIB


PA had the best price on this BCG. haven't assembled the 300 aac upper yet, but tried it on my 5.56 upper. I did run it wet & it functioned flawlessly. I may try it w/o lube just to see if it lives up to the hype. So far, happy with it & will buy again when on sale. Thanks Primary Arms!



PA is awesome. Good prices and same day shipping. Exactly what I was looking for.

Third one purchased


Purchased 2 at Christmas time for $98.00 each. Paid a little more for this one but still worth it.

Great BCG


Purchased this for a new build. Looks great. Have not tried it out yet. Wish I had waited though as 2 weeks after I received it they were on sale for $60.00 less. Oh well.

Great Product


Smooth bcg that will save me tons of time when cleaning. Bcg slid right in with no effort what so ever.

Great service.


Speedy service, fair pricing and good products make primary arms my go-to store. I recommend them to everyone needing parts or optics.



Switched it out in my AR and worked like a champ

Fail Zero bolt


The bcg is awesome what more can I say. Fast shipping and great prices from primary arms.

I found the bolt to deserve 5 stars!


The bolt Carrier Group arrived and I was very pleased when I opened the box and first saw it!It is well machined, few to almost no machine marks are visible. INSIDE AND OUR THE BCG is WELL MACHINED. Tolerances are perfect and finish is great. The nickel finish is even and well applied. The function of the bolt was flawless. I fired one round for safety check. NO PROBLEMS I fired three rounds for function check. NO PROBLEMS I fired 2 round for sighting corrections. Then fired three rounds for grouping. A 1/2" group at 50 yrs. BCG locked open on empty magazine. The bolt functioned every time and grouped the empty cartridges in a small circle to the right and behind me just as it should. I L O V E T H E B C G!