FailZero M16 / AR-15 EXO Coated Bolt Carrier Group

Manufactured by Fail Zero

Details

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 M16 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.

Features:

M16 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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Specifications

Bolt FinishNickel Boron

Bolt MaterialCarpenter 158 Steel

BrandFail Zero

Caliber Gauge5.56 NATO

Carrier FinishNickel Boron

Carrier Material8620 Carpenter Steel

Carrier StyleM16 Bolt Carrier

High Pressure TestedLive Fire Tested

Magnetic Particle InspectMagnetic Particle Inspected

Weight11.4 Oz

California Prop 65 warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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5/13/2024 4:25 pm 009-FZM16-4-01-NH

Bcg

by Bobcat -

Secound one I bought

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2/8/2024 8:50 am 009-FZM16-4-01-NH

Slick bolt

by Jake -

If it lasts the same as my last fail zero bolt carrier, I will have no problems at all with it. My other has close to 6k rounds on it an with some minor maintenance it's still working like new. The nickel boron really makes cleaning a world easier, and it's natural lubrication properties keep the bolt cycling smooth even between less than optimal cleaning schedules

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12/24/2023 11:32 pm 009-FZM16-4-01-NH

FailZero BCG

by Joseph Carillo -

Shipped well and arrived in great condition.Fast shipping. What else I can say it’s Primary Arms.If I can give 6 stars, I WILL !!

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10/5/2023 7:07 am 009-FZM16-4-01-NH

Best BCG I have ever bought!!!

by Ron -

I have purchased Nickel Boron bolt carrier groups from several different companies, including PSA, Spikes Tactical, etc. None of them are the same level of quality as the Failzero. It runs super smooth, and does not allow carbon build up like the others do, making cleaning much easier.

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7/15/2023 5:31 pm 009-FZM16-4-01-NH

Failzero bolt

by Michael Culp -

I built a new AR si i wanted to try this one. I love it, cleans very easily after shooting it for the first time. I am going to probably change out my bolt on mybother AR's to this one.

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5/25/2023 7:02 am 009-FZM16-4-01-NH

Nice product

by CKT -

Works great!

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5/2/2023 8:02 pm 009-FZM16-4-01-NH

Brittle edges which chipped quickly

by Jason -

I have purchased two of these. The first one no issues. The most recent one had very sharp edges on the bolt where it slides along the receiver. After only 25 rounds it began to chip along the edges producing very sharp jagged edge. I am working with Zero Fail directly now but have not been provided a resolution just yet. Nonetheless I will be purchasing an Aero bolt (the AR is an Aero Precision) to run from here on. If they replace it, it will be w spare.

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4/29/2023 9:05 pm 009-FZM16-4-01-NH

Quality peice of equipment

by Mike Honcho

This thing works harder than an ugly stripper. Can’t tell you why it works so good. How does a posit trac rear end work in a Plymouth? It just does! Highly recommend this bcg.

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4/28/2023 9:01 am 009-FZM16-4-01-NH

Fail Two Out of Three

by KevinJames -

I've attempted reviewing this before, and it never posts, so I'm trying again. I bought two of these. The bolt face on one was .002" out of spec shallow and wouldn't close on a minimum headspace gauge in any barrel I own. That explains the other reviews complaining about it jamming. I returned the one that was out of spec for exchange and received another one that also had an out of spec bolt, and as an added bonus, the bottom of the carrier had some sharp, jagged burrs on it, so I returned the replacement also.

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4/3/2023 1:29 pm 009-FZM16-4-01-NH

Good coating, weak staking

by Daniel Combs -

I like the coating on it very slick and even. However the stake job is very light. If I could send it back I probably would.

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