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FailZero M16/M4 Bolt Carrier Group (BCG), No Hammer
As Low As $149.99 Save Up to 11%
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Most Helpful Positive Review Decent bcg
This bcg is a great find at the price. Remember this is EXO nickel boron with with a black coating applied over that wears off on contact points. I think it looks cool as it brakes in, but some might get bent that it loses its prettiness. The gas key has been properly staked and runs well with all t...
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Most Helpful Negative Review Severe disappointment....
My wife and I used to sell them at our store. I didn't know much about them but I had heard a few good things and with a cool name like that I decided to try one out on a build I was doing. After about 300 rounds the Nib looked awful-like I put 10,000 rounds through it. That's just cosmetic tho...
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customer service is non existent

by Eddie, from FL, United States Written on May 14, 2025
I have about 8 failzero bcgs. I have had them for years and because of how well they had worked I just kept buying them. Well I have 3 that are brand new, never put in a gun that just sat in my drawer with extra parts that started to rust. I called repeatedly and left messages with failzero customer service as well as email them with pictures. Never once did I get a reply. I tried to clean them with the hope that maybe if I cleaned and oil then then maybe everything would be ok and the coating bubbled up and came off. Stay away! I Will NEVER BUY FAILZERO AGAIN! At least a warranty denial would be better than no answer at all.
Would recommend: No
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looks pretty

by eagle eye, from NV, United States Written on October 29, 2024
No doubt this looks good. Only time will tell if it stays pretty. Cleaning it seems harder, you can see every little gunk unlike the black factory BCG. Also not as easy to clean as you would think, carbon seems to stick to it pretty good and I leave a thin CLP coating on it too.
Would recommend: Yes
1 of 1 found the following review helpful.
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Fail zero bolt carrier group

by Builder, Verified Owner from WI, United States Written on May 26, 2024
Top quality bolt carrier group. It is my preferred bcg by far. Great quality for the price point.
Pros:
  • High quality NIB coating
Cons:
  • None
Best Used for:
  • Ar15 platform rifles
Would recommend: Yes
Was it helpful to you? Yes | No

BOTH Fail Zero bcg's Failed

by Daniel Avery, Verified Owner from TX, United States Written on May 13, 2024
I bought these because they were on sale and I had always had good luck with Fail Zero products. Not this time both were deadright out of the package. I took them in the house disassembled and oiled them tried again and one shot again. I took them outside and had my wife video it. I have had bcg that worked in other guns but these don't run in my Daniel Defence or my other Proof Research barreled upper.
Would recommend: No
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Very slick

by Mark, Verified Owner from NC, United States Written on March 5, 2024
This bolt carrier group is very slick. I don't know how long the nickel boron finish will last yet since I've only fired about 300 rounds with it, but it operates flawlessly and is very easy to clean. If the finish holds up this will be my go to bcg for future builds.
Would recommend: Yes
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where did u get a bad one at?

by grendel, Verified Owner from WA, United States Written on July 31, 2022
Ive put thousands of supressed rounds in everything from 198 silverback 300 to 458 socom out of these carriers and never had a problem. They always run dry no clp only clean em when something starts to mess up. For the money how can anybody complain about these bcgs unless they get a rare factory lemon
Would recommend: Yes
2 of 2 found the following review helpful.
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Not properly staked

by Heath, Verified Owner from WI, United States Written on January 15, 2022
It initially seemed nice but upon closer inspection it has a major flaw and a minor flaw. Major - The right sides of both screws were not properly staked. The indentations weren't even touching the screw. Minor - it has a good number of tool marks on it, though they are cosmetic and not in places where it contacts the rifle.
Would recommend: No
3 of 9 found the following review helpful.
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Runs like a champ

by Jackal, from TX, United States Written on May 30, 2021
I have one of these in my AR-15. I used a BCM extractor upgrade kit, and a milspec hammer spring (not sure if nessessary), but my AR-15 eats steel like it was brass. I shoot brass and Wolf steel loads with no problems/ ftf. These things are solid. They are also very easy to clean. Keep in mind that nickel does have a tendency to stain after a while. Diamond metal polish will remove the staining, but i dont think its worth it personally. It still maintains the same lubricity and function, stained or not.
Would recommend: Yes
4 of 4 found the following review helpful.
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Good product

by Hart, from PA, United States Written on December 21, 2020
This is a good bcg I have used it and have had no issues. It looks great and funtion great my only negative is the bolt itself is a little harder to clean the carbon off of. I read reviews saying it was the super easy to clean. the rest of it wipes clean with just a rag over all the bcg is worth buying
Would recommend: Yes
4 of 4 found the following review helpful.
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My favorite BCG on the market

by Be Legendary, Verified Owner from OR, United States Written on September 15, 2020
The name says it all “FAIL ZERO” and it’s true to form... The Fail Zero BCG is by far my favorite go to for any AR build... The finish is very durable and very slick which saves on wear and tear with your upper receiver... The price is very competitive for such a high end BCG... i’m tried out many different BCG’s and I always find myself going back to FAIL ZERO...
Pros:
  • Price, durability and very functional
Cons:
  • None as of yet
  • nothing so far
  • None so far !
Best Used for:
  • any AR build
Would recommend: Yes
5 of 5 found the following review helpful.
Was it helpful to you? Yes | No
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