Fail Zero AR-15 BCG Autopsy (Part 2)

[@darikdatta]

The other hole is missing some thread that broke clean off. Which would have been about the same shape as the metal shard from part 1.

[@johnpoole8321]

Bingo.

[@Daninbristolbay]

wow and I learned more!

[@xavierterrell2457]

I haven’t had any issues out of mine this video did make me check the staking which I got no movement from the fasteners or the gas key itself

[@curtismay8323]

Drill it out with oversized holes rethreaded drill out the key and you're done call it a day it'll probably work like that for its lifetime.

[@jamesdrakcip9276]

After this video, the company changed their name to "Fail One"

[@bobbob8229]

Or "Fail Now And Then "

[@MoY206]

😂

[@BPC556]

I bought one of these BCGs a few months ago and had the exact same problem. Didn’t cycle, no matter what rifle/ pistol I put it in. I didn’t do a reverse torque test (I wanted to send it back). FailZero sent me a brand new one a month later, didn’t have a problem getting in touch with them or with customer service. Haven’t had an issue with the new bolt yet (I have less than 500 rounds through it)

[@Thayes1979]

The holes are not chamfered as well. Any hole that will be tapped has to be chamfered first and I would say that is more of the cause of the top thread breaking than the coating.

[@DANTHETUBEMAN]

Cutting a chamfer should go to all good metal. I would repair that.

[@paulhughes3961]

I Know one thing I will certainly make a point to inspect my BCG's more closely before I put them in a rifle.

[@joohat]

Preface: hobbyist at best, not a gunsmith Late to the party on this one, but if one were to run a thread chaser or tap through those gas key holes, replace the gas key, secure with proper fasteners to torque spec, then stake the key as is warranted, would that not solve the issue? I wonder if the top of the thread trying to be unwound would be kept secure by the gas key holding it down.

[@Marcus2750-u1t]

Phosphate only for me PERIOD! No coatings no nitride even!

[@paymanalimi8201]

I wander it will covered under warranty

[@seanhatch4425]

This BCG was manufactured on a Friday at 4:59pm😅

[@richardgoodson8922]

After 400 rounds my fail zero bolt carrier gas key is loose I’m not a gunsmith what do I do send it back

[@spicychich1718]

Wow…. Thank you for sharing this valuable info.

[@caddydaddyz3052]

Fail zero has a lifetime warranty! Why wouldn't you contact them for your client or have the client contact them for a warranty replacement before trying to replace the gas key and charging your customer?

[@janwilliams178]

My fail zero bcg hasn't failed me after three years of use but I will keep an eye on the gas key.

[@MorganOliff]

Man $.25 worth of a chamfer would’ve gone a long way towards preventing that. I wonder if it was so unsupported because it was propped open with the shard that the screw elongated and just popped that piece out?

[@lyndeen]

Thanks for the follow up.

[@sawdustwhisper9397]

Why don’t you like the locking lugs on the sharps bcg’s?

[@just1ofgod]

So basically it is no good but if you had nothing else maybe it could be crowned if one had no other options?

[@johnlong384]

Well, I'm very impressed with your knowledge about the matters but, without trying to be a smarty, I would remove the tiny piece of loose metal and cut the correct thread size before getting rid of the part since I'm running on very tight budged and re-use whatever I can - take care!

[@shaocaholica]

But it’s called Fail Zero

[@screamingalpha18]

Literally looking at them sitting on the shelf, googled the reviews, and you popped up...

[@mayjahcon4662]

Wow I was up in the air between a Midwest and a fail zero... decision made lol

[@michaellothyan1789]

lol 😂

[@GetMeThere1]

Wow. What a mess. Thanks for these videos. I know now that looking for carbon around the gas key might be a good idea...

[@HotBrass-Lead]

I bought a fathers of freedom microbest bolt carrier based on your video of it and it’s been great in my 300 blackout 7.5 inch pistol .

[@jeremydarkcountrysteckman9496]

Mine did the same thing i replaced it with a psa dlc

[@Steelandbrass]

Hmmm, no chamfer on the hole and the evidence that they attempted to torque it with contamination on the surface. I don’t think this was hydrogen embrittlement.

[@chicorodriguez3964]

I've had 3 different failzero bcg,s and had absolutely no issues with them tested with 1000 rounds apiece in 5 different uppers during the tests although I would agree the quality control could be better but the whole reason I did the testing was I thought the coating was going to cause issues

[@CZ-Perfected]

Of the bolt carriers groups ive seen broken have both been nickle boron and were fail zero. One 556 bolt one 308 carrier cracked.

[@nammie12345]

I have 2. One is ok, one will not cycle, fails to cycle when others do. Fail Zero refused to even respond. Both are nickle boron.

[@Marcus2750-u1t]

Nickel boron and fz are both junk, if its not applied perfect then it will fail and whats perfect in this world? Theres ur answer!

[@wintonhudelson2252]

Keep these videos coming. This is important stuff to know, as the shooter's life might depend on it.

[@gcanaday1]

That looks to me to be the fault of the coating. The screw couldn't go in, but it was able to catch the top thread and shear it off. 58 in/lb might be enough to do that if there wasn't more than a partial engagement on the first thread. Without a full turn of engagement, you're torquing the weakest part of the substrate material on the entire bcg. Without 3 full turns, you don't have the full strength of the thread. It's a recipe for failure. I've done this in other circumstances,and yes, I've trashed the parts. I just ordered one of these and will be giving it a thorough once-over concerning the gas key when it arrives. If I find any similar issues, it will either go back or I'll also check out what's under that key.

[@Savedsdc]

I had what I'm assuming was the same issue. BCG wouldn't run in a blackout and after 2 mags in a 5.56 the key came loose. Fail Zero took it back and sent a new BCG, which I've had 0 issues with.

[@Catgat37]

So you are saying that sometimes they put out a lemon or two?

[@Savedsdc]

@@Catgat37 Sometimes, but they stood behind it and made it right for me.

[@Catgat37]

@@Savedsdc good to know. I just bought one for my first build. Everything seems solid on it...we will see.

[@Savedsdc]

@@Catgat37 Congrats on your first build! You found a great resource in this channel

[@Iamgroot377]

​@@Catgat37 How's your bcg been so far? I just purchased a FailZero BCG, EXO Nickel Boron Coated Black and after seeing all these issues with FailZero im skeptical.

[@cjanquart]

:channelling 'The Running Man':: Fail Zero, now Plain Zero!

[@ricardofernandez1972]

Good work, thanks for all the good education.

[@ScottAT]

Oh, my…. That’s kind of scary.

[@XER239]

Where do you get these specific bolt carrier test tools?

[@oldguyofarizona8602]

Fail One

[@ntj8198]

Curious did the owner send the unit back for warranty? If so did Fail Zero do right by him? It still does not negate the fact that the threading was undersized and the damaged metals. This would definitely fall under a quality control issue and if it happened to this bolt carrier wonder how many others from that batch were bad as well? Makes one wonder how this ever passed their inspections or if it was ever caught from batch inspection/testing. Any idea when this bolt was purchased? I know that's alot of questions you might not have answers for but would definitely give some closure. If Fail Zero swapped for another one if you can do a follow up video that would be great! love your videos. Very informative.

[@jorgeposadas1192]

@@springbloom5940 hahahahahahahaha so true, I would take the warranty and do a video of me melting that crap.

[@nammie12345]

In my experience they have zero customer service. Stay away from their products.

[@Romuls753]

The coating isn't an issue if the manufacturer gets the screw bore size right

[@nofortunatesonII]

FailZero would not replace this? Obviously manufacturing defects.

[@oneslackr]

After seeing these videos on Fail Zero I'm crossing these off my list. I'm glad I never bought one. Why take the chance when there are other quality brands to choose from.

[@z0diak08]

Could you do a vid on an LWRC enhanced BCG?

[@jwmeitzler2671]

I would like to see that also.

[@snakeyes7711]

I believe that metal shaving could have put stress on the top of that rear bolt threads when it was assembled causing the crack.

[@clems6989]

Good Catch !!

[@williebulletman5217]

That’s very interesting I never thought that would could happen like that that nickel boron would make it brutal thanks for the video

[@fmt5327]

If NB could cause it to be brittle, wouldn’t nitride do the same?

[@blckandwhtknight]

NiB is a coating, where Nitriding is a surface hardening treatment. Think Chrome lining vs Case hardening.

[@realisrealite5554]

The fancy coatings may be easier to clean but they can flake too.I use plain Colt bcg's and they have never let me down.

[@Greighps]

Fail once*

[@mikecarr9849]

There are high quality AR parts and there are lower quality AR parts.

[@SW-ii5gg]

And sometimes they are mixed all together.

[@scott2228]

BCG manufacturer u would stand behind? Will not be buying 1 of these!!

[@abolishtheatfandrepealthen6014]

Wish i knew nickel boron was a gimmick when i first started building. I havent had issues yet with my toolcraft nib but i wouldve gone with phosphate if i knew half of what i know now

[@CobraMustang]

I have a FailZero with 1500 rounds on it and it's a much older carrier. I swapped it for a POF which I'm going to say is the only nickel plated carrier I trust so far.

[@timothygarrahan2122]

@Concerned Citizen, cause you listen to this guy? I have 2 and they run perfectly. My competition buddy builds high, high dollar firearms from scratch (built a custom 1911 for Trump) and he recommends the NB Fail Zero BCGs. So listen to who you wish. I know from how mine perform that they’re good & then I’ll also take my gun builder buddy’s opinion over this Ya Ho any day. You have no idea about the background on this particular BCG that is being autopsied 🙄!