I've learned so much about what to look for and what matters when it comes to my rifles.. this channel is the best rifle channel on YT.... I looked at one of my extractor and it had a rubber donut and a insert,, so I took out the donut,,,
Most of them. I remember a Marine Gunny that was an airport firefighter, he said that the equipment manufacturer voided the warranty for corrosion due to how often the frame got scrubbed to clean it.
Worst for me was "Well, it's a training weapon. Who cares as long as it isn't completely unsafe?" The 1911s we qualified on in Germany rattled and shook so badly that you'd be lucky to hit an E-type silhouette at 15yds.
It scares me how some people are so sure of the shitty advice they give out too. One of my NCOs swore by barbasol as a good lubricant and cleaning solution. Life is pain.
Most of them... Honestly, part of the problem is CLP. Instead of using a proper solvent to remove carbon build-up, we're just told to keep scrubbing. There are plenty of solvents on the market that do a lot better job of breaking down deposits without all the mechanical wear due to excessive scrubbing, but instead we use an all in one cleaner/lubricant/ corrosion protection, and it really doesn't do any of those too well.
You have convinced me about not buying nickel boron coated bolts simply because I would have to take off the Gas key ,chase the screw threads with a tap, then seal and stake a new key before I even shoot anything with it. All that just to aid in cleaning and supposed lubricity? Forget it . I'll just buy a regular BCG, clean and lube as usual and call it good. Something to watch for if someone has a problem with theirs and they have one of these bolts. Now I have the knowledge to maybe solve their problem with running issues..... Your videos are outstanding sir.I have a habit of just grabbing my notebook right from the start of any one of your vids because of some excellent information you are about to espouse. I have learned so much it's ridiculous. Thank you for what you do and I greatly appreciate you taking time to spread that armorer gold.
THIS REMINDS ME SO MUCH OF MY OLD JOB! wow i love how relaxing and refreshing it feels to see the NG gauges but for AR specs instead of electrical connectors. Nice
I respect his attention to detail and thorough assessment of each component while detailing what should or shouldn't be the parameters. A Top Shelf Professional !
I have been working in gunsmith shop for a while and have had several rifles come in with gas issues with fail zero bcgs and have had them fixed by switching to a different bcg. This has happened with other companies, but it seems to be particularly common with fail zero in my experience
Great video! I work with EN, and it's frustrating to see poor quality control like this. Between the firing pin protrusion issue and overbuild in the threads, a simple thickness gauge might have prevented this autopsy. Unfortunately, crossing your fingers that the consumer doesn't have issues with the product or a shoddy QC culture seems to be more prominent than scrapping the part or stripping the finish. Great customer service shouldn't be a mask for poor manufacturing. Edit: It really isn't difficult to keep from over plating EN. A reasonable operator will be keeping track of the deposition rate (in 10ths per hour, usually) and most places run coupons with the work to check for adhesion, plating thickness, deposit stress, etc. A well-trained employee will buy you freedom from 100% QCing these huge production runs.
Sounds like they need to add a production step of chasing the threads with a bottoming tap after coating. That would eliminate this problem. I wonder if they failed to account for the thickness of the coating and that also explains the dimensional problem with the bolt tail, which limited firing pin protrusion. Thoughts? And since I have this product now I have to go check mine carefully. Without the benefit of your beautiful gauge assortment.
I have a FailZero nib bolt with only a couple hundred rounds on it. I will have to drag out of the safe and tear it down. I just found your channel and really enjoy it. Thanks for the information.
For the price of the fail zeros and what someone as knowledgeable as Chad would most likely charge to repair the mentioned issues, you could've bought a really, REALLY nice BCG from a quality company.
I just tore down a Rock River Arms Elite Operator carbine 5.56 I’ve had and run like a scalded dog for 15 years. Perhaps 60,000 rounds. I used a lot of these videos to diagnose any issues…..and no exaggeration the chrome lined barrel and chrome Molly BCG are in fantastic shape. I did replace the gas block and tube with an SLR low profile adjustable block and new mid length tube. She runs softer….perfect gassing for its intended purpose. As with all my RRA rifles it’s superbly accurate with the right ammo.
@Instructor Chad At times you offer suggestions on how to fix problems, and at others you don't. Case in point: In this video, you noted the carrier key screws didn't go down all the way; you didn't suggest tapping the screw holes sufficiently to allow the proper depth for seating the screws. What are your standards for when to offer suggestions? And when not to?
Huh? I am positive his suggestion would be to throw it in the trash or return it to manufacturer if it's out of spec. Why would you waste time trying to fix something when there are better products readily available?
@@yunggolem4687 It's part of our throwaway culture these days. Personally, I'm going to buy the tap and a replacement gas key NOW, as I got one of these fail zero bcgs just yesterday. In an earlier video with the same issue, he did mention chasing with a tap and was going to do that until he found that the screw had lifted the top thread on the bcg. Personally, I'd have busted that out and chased them and then put it back into service. You only need 3 turns for full strength. To non-machinists: it is correct to chamfer a hole to a touch past the major diameter prior to making threads as that removes the weakest first thread, leaving the remainder as strong as the material will allow. That, coupled with chasing that coating out at manufacturing time, will prevent every single failure I've heard of with this brand.
Great...Now I'm Binge watching your channel !!! Fabulous videos....This is great for those "Thinking" about buying a Fail Zero....But like I said in your other video...I bought 2 PreCovid and have not ran either one....and now wondering if they are both BAD .....They both have YFS gas screws.... Does anyone know if Fail Zero has ever done a Recall of this obvious problem ??? Thanks for all your help....
I'm darkly amused at the grand irony of a company calling itself "Fail Zero" when this video shows its BCG has such flaws (found merely on visual inspection) as insufficient staking & a force-mashed ejector roll pin. Then at 17:30 - 19:35 the real QA/QC flaws are seen! Why wouldn't Fail Zero re-cut those threads to the proper depth before sending out the BCG?
@@dakine808shooter lol. same here. Went on sale and i said why not. Well it doesnt mate with the lugs on the barrel as easy as it should. No rounds through it yet. After watching this video i really Need to go through and inspect it and compare it to my other good AR bolts
@@dakine808shooter just literally finished looking at mine. Took the bolt apart and it checked out. Put it back together and its going in better than it was. Other bcg’s went into the receiver/barre like butter. Staking isnt great so im thinking about the threads too. Might need to get that torque wrench man. Lol
I had a fail zero bcg I had to send back to them for replacement few months ago. Put the rifle together and went to range to go over function test and put a few rounds through it. Never ran into a malfunction in the 200 rounds through it that day. Got home and pulled out bcg to clean and inspect. Noticed right off hand that the gas key had came loose already. Fail Zero does have a great cust.service I found out. They shipped out a new one to me with excellent staking. I have heard on forums that they had a bad batch go out with improperly staked keys.
I'm not going to condemn FZ, or any other manufacturer, on the basis of a single issue, but since I just bought two new FZ bolts, but I will be giving them a "pre-employment" physical before using them. It would behoove everyone to take information like this and use it to prevent potential issues. And not just for any single brand. Trust nothing, verify everything. I really think that's the intended spirit of Chads videos in the first place.
These BCGs sell out immediately when they go on sale for $100 or less and I've been wondering why and if they're even good BCGs as they're normally $180 which should indicate that they're premium. BCGs are the most complicated part in your AR15. I'll spend some $ on a great BCG (Lantac E-BCG) but just never looked at these Fail Zero No Hammer NIBo as such.
I just watched your channel for the first time today, watched several of your videos and learned a lot. Maybe you already did this and I haven't seen yet but a video naming all the gauges and maybe where to purchase them would be awsome for us do it yourself kind of guys would be awsome. Im familiar with some but not all. Thanks for the great videos, I subscribed and are going to tell all my gun buddies about your channel. Thanks again !!
I am not a machinist, but I have heard that Un-torque readings mean nothing. The spec is for the Torque of the screw. Also, staking is to prevent the screw from backing out & would affect the reading as well.
i would bet a large majority of average class ar style rifles have parts that would not pass these tests, that doesn't mean they won't function it just means they aren't ideal and in some instances, with varying ammo they might have reliability issues and that is something you don't want in a competition or battle rifle. that is why most off-the-shelf rifles are over-gassed.
How did you come up with your tolerances for your gauges that you use on BCG? I assume you made your gauges. What are the sizes from green to red on them? Or is this your trade secret? There must be BCG tolerances we can all look up somewhere? I know others (myself included ) would like to gauge their bcg's just for giggles. Could you supply gauge sizes for us?
This is my 5th or 6th vid watching. After 40 years of AR platform use (started on M-16s), I’ve learned so much I wish I’d learned long ago. Much appreciated. Q: how could the small parts you’re checking become magnetized.
How would somebody determine if the bolt is too long for the firing pin or if the firing pin is too short for the bolt? Could a person lathe down the shoulder on the firing pin or would it make more sense to shorten the bolt?
Where can I get all the gauges you are using? I believe some are PTG but I wanted to see if you sold them all as a kit or similar. I do a all my own work for bolt guns and I'd like to start working more with gas guns. Seems like these are very handy for diagnosing issues. Actually are those just gauge pins I can get at any mechanics/engineering supply place? if so which sizes do I need?
@@ScottKenny1978 yes. In theory. It's like how they use safety wire on racing motorcycle bolts so if they come loose, they still can't move. It's just an insurance policy because those bolts don't have much room on top and get subjected to the entire recoil impulse of the gun
I think a nickel boron is ok for barrels but not bolt carrier groups. The black phosphate coating milspec bolts have is good. I've had no problems with my non nickel boron coated BCG's.
It would be nice if you could include the approximate round count on submitted BCG's. Also, you said you were going to do a physical on a Radian BCG a little while ago so looking forward to that.
Is there anyway you could list the gauges used and where quality ones can be bought? Im going to SDI right now ans starting my journey into gunsmithing. Would like to initially get whats needed for 5.56/.223 and 9mm
Any time a component with threaded holes is plated is MUST have a tap run back though to be sure the threaded holes are free of obstructions... That's pretty basic.
Where can you buy all of these essential tools? I’m currently going through the process of becoming a legit gunsmith and would like to eventually open my own repair shop! Thanks in advance if you don’t mind giving me some answers. I love your videos and get in trouble with the wife every night because I can’t put the phone down once I start watching any of your videos.
It's all standard gauge pins and holders used absolutely everywhere in manufacturing. Ring gauges for the bolt tail. All you need is the Go NoGo and Field measurements.
They're straightforward to replace, about $3 a set. Remove the old ones with a pick then needle nose pliers. Install is a little delicate, lots of videos online and inexpensive to try again if you break one.
Welp... looks like im upgrading to a sandcutter and lmt enhanced bolt now... On another note im actually legitimately surprised this bcg failed so badly, I have 3 fail zero bcgs in 3 different rifles all roughly sitting around 8k rounds each and haven't had a single issue, this includes about every 1k rounds doing a full bolt tear down and doing some basic gaging and inspection, though nothing like this, suddenly feeling like I should though.
Love watching this content- but have a question as a noob- You measure the total length of the carrier for spec, but when firing pin protrusion was a little short and the potential cause was short bolt length- why didn't you measure the bolt to confirm it's length spec? Thanks for the vids
The bolt's length doesn't determine how far the firing pin protrudes from it. The depth of the coreesponding shoulders of the firing pin hole in the bolt does. The bolt could be a quarter inch longer than it needs to be, and as long as the firing pin can slide down it far enough, it won't effect protrusion length. As a weird analogy, if I asked you to sit in your car and touch your front windshield, it doesn't matter how long your car is, what matters is how close to the windshield your seat is.
These companies aren’t gonna like it when your channel gets bigger. Stay honest.
what 3?
Fail Zero trashed their own name thanks to their shoddy QC.
I think I just stumbled upon my new favorite channel!
Same
Definitely
YOU AND I BOTH!!
Dang! I learned more about Bolt Carriers in the last 20 minutes than I thought possible! Awesome channel. 🇺🇸
This dudes the CEO of gauges
And the entire board of directors by himself
His name is guage they were named after him
Bur the first tool is the most expensive.
"my wife caught me" they always catch you if you try to pin the wrong hole
I've learned so much about what to look for and what matters when it comes to my rifles.. this channel is the best rifle channel on YT.... I looked at one of my extractor and it had a rubber donut and a insert,, so I took out the donut,,,
So much info here. The more I learn the more I think I should get a few gauges.
You're the only man I know who can revive the patients of his autopsies!
I wonder how many military rifles in the Army and Marine Corps would fail due to hyper aggressive cleaning methods.
Most of them.
I remember a Marine Gunny that was an airport firefighter, he said that the equipment manufacturer voided the warranty for corrosion due to how often the frame got scrubbed to clean it.
Worst for me was "Well, it's a training weapon. Who cares as long as it isn't completely unsafe?" The 1911s we qualified on in Germany rattled and shook so badly that you'd be lucky to hit an E-type silhouette at 15yds.
It scares me how some people are so sure of the shitty advice they give out too.
One of my NCOs swore by barbasol as a good lubricant and cleaning solution.
Life is pain.
Most of them...
Honestly, part of the problem is CLP. Instead of using a proper solvent to remove carbon build-up, we're just told to keep scrubbing. There are plenty of solvents on the market that do a lot better job of breaking down deposits without all the mechanical wear due to excessive scrubbing, but instead we use an all in one cleaner/lubricant/ corrosion protection, and it really doesn't do any of those too well.
Murphy's law of combat: Never forget that your rifle is made by the lowest bidder.
You have convinced me about not buying nickel boron coated bolts simply because I would have to take off the Gas key ,chase the screw threads with a tap, then seal and stake a new key before I even shoot anything with it.
All that just to aid in cleaning and supposed lubricity? Forget it .
I'll just buy a regular BCG, clean and lube as usual and call it good.
Something to watch for if someone has a problem with theirs and they have one of these bolts. Now I have the knowledge to maybe solve their problem with running issues.....
Your videos are outstanding sir.I have a habit of just grabbing my notebook right from the start of any one of your vids because of some excellent information you are about to espouse. I have learned so much it's ridiculous. Thank you for what you do and I greatly appreciate you taking time to spread that armorer gold.
These videos are addictive. I love the technical aspect.
You need to do this with all the bolts on the market but right out of the box, brand new.
THIS REMINDS ME SO MUCH OF MY OLD JOB! wow i love how relaxing and refreshing it feels to see the NG gauges but for AR specs instead of electrical connectors. Nice
I respect his attention to detail and thorough assessment of each component while detailing what should or shouldn't be the parameters. A Top Shelf Professional !
I have been working in gunsmith shop for a while and have had several rifles come in with gas issues with fail zero bcgs and have had them fixed by switching to a different bcg. This has happened with other companies, but it seems to be particularly common with fail zero in my experience
Your wife does an excellent job running the camera. Always gets good shots.
Another amazing video. Thanks!!
Great video! I work with EN, and it's frustrating to see poor quality control like this. Between the firing pin protrusion issue and overbuild in the threads, a simple thickness gauge might have prevented this autopsy. Unfortunately, crossing your fingers that the consumer doesn't have issues with the product or a shoddy QC culture seems to be more prominent than scrapping the part or stripping the finish.
Great customer service shouldn't be a mask for poor manufacturing.
Edit: It really isn't difficult to keep from over plating EN. A reasonable operator will be keeping track of the deposition rate (in 10ths per hour, usually) and most places run coupons with the work to check for adhesion, plating thickness, deposit stress, etc. A well-trained employee will buy you freedom from 100% QCing these huge production runs.
Fail zero be like: “It can’t fail if it doesn’t work to begin with.”
Thanks for the video! I learned more from these videos than I ever cared to. Now I have this need to check all my uppers/bolts...
Ive learned more from your channel than I learner at school about anything!
Sounds like they need to add a production step of chasing the threads with a bottoming tap after coating. That would eliminate this problem. I wonder if they failed to account for the thickness of the coating and that also explains the dimensional problem with the bolt tail, which limited firing pin protrusion.
Thoughts?
And since I have this product now I have to go check mine carefully. Without the benefit of your beautiful gauge assortment.
That make sense. Esp if the bolt and the firing pin both have the coating. Mutiple layers adding up.
It'll tap no problem
I have a FailZero nib bolt with only a couple hundred rounds on it. I will have to drag out of the safe and tear it down. I just found your channel and really enjoy it. Thanks for the information.
For the price of the fail zeros and what someone as knowledgeable as Chad would most likely charge to repair the mentioned issues, you could've bought a really, REALLY nice BCG from a quality company.
I run suppressed 300 blk and I love my light weight boron bolt.
Adjusted the gas down and threw a jp capture spring in it...
Shoots smooth!
This channel is really informative I keep watching video after video.
I just tore down a Rock River Arms Elite Operator carbine 5.56 I’ve had and run like a scalded dog for 15 years. Perhaps 60,000 rounds. I used a lot of these videos to diagnose any issues…..and no exaggeration the chrome lined barrel and chrome Molly BCG are in fantastic shape. I did replace the gas block and tube with an SLR low profile adjustable block and new mid length tube. She runs softer….perfect gassing for its intended purpose. As with all my RRA rifles it’s superbly accurate with the right ammo.
Easily my new favorite RUclips channel. Thanks you!!
@Instructor Chad
At times you offer suggestions on how to fix problems, and at others you don't. Case in point: In this video, you noted the carrier key screws didn't go down all the way; you didn't suggest tapping the screw holes sufficiently to allow the proper depth for seating the screws. What are your standards for when to offer suggestions? And when not to?
Huh? I am positive his suggestion would be to throw it in the trash or return it to manufacturer if it's out of spec. Why would you waste time trying to fix something when there are better products readily available?
DavidMN $$$! Send it back to Fail 💯. I’m sure there is a warranty.
@@yunggolem4687 It's part of our throwaway culture these days. Personally, I'm going to buy the tap and a replacement gas key NOW, as I got one of these fail zero bcgs just yesterday.
In an earlier video with the same issue, he did mention chasing with a tap and was going to do that until he found that the screw had lifted the top thread on the bcg. Personally, I'd have busted that out and chased them and then put it back into service. You only need 3 turns for full strength.
To non-machinists: it is correct to chamfer a hole to a touch past the major diameter prior to making threads as that removes the weakest first thread, leaving the remainder as strong as the material will allow. That, coupled with chasing that coating out at manufacturing time, will prevent every single failure I've heard of with this brand.
Very impressive work both as a gunsmith and a videographer...new subscriber.
Obligatory "fail zero? Are you sure about that?" joke.
Really appreciate these videos!
Great...Now I'm Binge watching your channel !!! Fabulous videos....This is great for those "Thinking" about buying a Fail Zero....But like I said in your other video...I bought 2 PreCovid and have not ran either one....and now wondering if they are both BAD .....They both have YFS gas screws....
Does anyone know if Fail Zero has ever done a Recall of this obvious problem ???
Thanks for all your help....
Learning all kinds of new stuff. Great info and presentation
Disappointing for sure, purchased one for my 10.5" pistol over a year ago, wish I'd seen this before hand. Thank you for what you do, sir!
This channel. IS AWESOME.
I'm darkly amused at the grand irony of a company calling itself "Fail Zero" when this video shows its BCG has such flaws (found merely on visual inspection) as insufficient staking & a force-mashed ejector roll pin. Then at 17:30 - 19:35 the real QA/QC flaws are seen! Why wouldn't Fail Zero re-cut those threads to the proper depth before sending out the BCG?
Def putting this company on my do not buy list.
I just bought one lol....damn! Atleast I know what to check now
@@dakine808shooter lol. same here. Went on sale and i said why not. Well it doesnt mate with the lugs on the barrel as easy as it should. No rounds through it yet.
After watching this video i really Need to go through and inspect it and compare it to my other good AR bolts
@@30srevolution21 I'm a bit concerned about the gas stake, if the boron is in the threads . Don't have that torque wrench lol
@@dakine808shooter just literally finished looking at mine. Took the bolt apart and it checked out. Put it back together and its going in better than it was. Other bcg’s went into the receiver/barre like butter.
Staking isnt great so im thinking about the threads too. Might need to get that torque wrench man. Lol
Amazing videos man, highly educational! Gained a subscriber.
I have a tal-zero bolt carrier and after watching your Chanel the last two days I’ve lost confidence in it and I haven’t been able to soot it yet!
What the important things to check for a person with not gauge tools? A were to get tools list would help.
I had a fail zero bcg I had to send back to them for replacement few months ago. Put the rifle together and went to range to go over function test and put a few rounds through it. Never ran into a malfunction in the 200 rounds through it that day. Got home and pulled out bcg to clean and inspect. Noticed right off hand that the gas key had came loose already. Fail Zero does have a great cust.service I found out. They shipped out a new one to me with excellent staking. I have heard on forums that they had a bad batch go out with improperly staked keys.
I don't accept the bad batch explanation. I have been seeing these problems consistently from all brands of NiB BCG for the past 10 years.
@@SchooloftheAmericanRifle why is it the NIB ones with most problems? Is it from inconsistent coating thickness or somthing along those lines?
ZACK MOORMAN
Watch the video. He explained why.
@@boosted95 in the video he illustrated the NiB coating gets into the threads causing a false torque reading
I will give credit for good customer service, but good QA would make customer service just about unnecessary.
Awesome videos, I'm learning a lot here and this is helped me to make my decision on a BCG. Thank you very much.
I'm not going to condemn FZ, or any other manufacturer, on the basis of a single issue, but since I just bought two new FZ bolts, but I will be giving them a "pre-employment" physical before using them. It would behoove everyone to take information like this and use it to prevent potential issues. And not just for any single brand. Trust nothing, verify everything. I really think that's the intended spirit of Chads videos in the first place.
Dang that's a bummer. I really like my fail zero bcg I obviously don't have all these gauges, but I checked it out thoroughly after watching this.
Why test for magnetism?
Because if you use steel ammo it will hold onto small steel shavings causing it to fowl up faster
These BCGs sell out immediately when they go on sale for $100 or less and I've been wondering why and if they're even good BCGs as they're normally $180 which should indicate that they're premium. BCGs are the most complicated part in your AR15. I'll spend some $ on a great BCG (Lantac E-BCG) but just never looked at these Fail Zero No Hammer NIBo as such.
I just watched your channel for the first time today, watched several of your videos and learned a lot. Maybe you already did this and I haven't seen yet but a video naming all the gauges and maybe where to purchase them would be awsome for us do it yourself kind of guys would be awsome. Im familiar with some but not all. Thanks for the great videos, I subscribed and are going to tell all my gun buddies about your channel. Thanks again !!
Thank you for the educational experience.
I wonder if he's done any on cryptic coatings yet, I've seen alot of good things on them but I've never owned one yet
Over cleaning sounds like every arms room I have ever had to turn a rifle into
Great info and thx. Can you please so a video on gas block and tube fails? THx
Fantastic. Thanks for all the info you’re putting out here!
This is why I pass on the fancy coatings and stick with phosphate.
I’m learning a lot more thank you Sir!
Damn this is enlightening! Awesome information. Do you have a BCG manufacturer that consistently impresses you?
Funny enough, just yesterday at the range had a dude with this bolt where their AR wasn't cycling. Swapped in my budget BCG and it worked fine.
Just wow, color me impressed!
Really like your videos. I just started watching your videos today and I have seen two fails by this company. Thank you for time to educate me.
"Dont let my opinion of Nib sway you". From a master of the AR. Yea dude it sways me
My gas rings failed with less than 150 rounds fired. I also need a lot more tools to test the bcg. Thanks awesome video.
Hmmm.. Wondering if you've ever done a WMD BCG Autopsy?
Lots of tools and I love tools. (Shop teacher) how do you find them and how do you know the stay accurate over time?
Did you repair the FZ ??how?? Did the customer use the FZ?? Thanks...
I have one of these bcg’s and haven’t been able to shoot much from that gun yet. Now I’m second guessing paying so much for the thing!
I am not a machinist, but I have heard that Un-torque readings mean nothing. The spec is for the Torque of the screw. Also, staking is to prevent the screw from backing out & would affect the reading as well.
i would bet a large majority of average class ar style rifles have parts that would not pass these tests, that doesn't mean they won't function it just means they aren't ideal and in some instances, with varying ammo they might have reliability issues and that is something you don't want in a competition or battle rifle. that is why most off-the-shelf rifles are over-gassed.
How did you come up with your tolerances for your gauges that you use on BCG? I assume you made your gauges. What are the sizes from green to red on them? Or is this your trade secret? There must be BCG tolerances we can all look up somewhere? I know others (myself included ) would like to gauge their bcg's just for giggles. Could you supply gauge sizes for us?
This is my 5th or 6th vid watching. After 40 years of AR platform use (started on M-16s), I’ve learned so much I wish I’d learned long ago. Much appreciated.
Q: how could the small parts you’re checking become magnetized.
Often times people will use magnetic parts trays to keep things from flying away, which can transfer the magnetism.
@@curseofthegreat , thank you. I’ll remember not to use those.
This is exactly why I tell people that ask me what parts to get for an AR build that the brand matters.
if you're watched more of his videos, it really doesn't
How would somebody determine if the bolt is too long for the firing pin or if the firing pin is too short for the bolt? Could a person lathe down the shoulder on the firing pin or would it make more sense to shorten the bolt?
I will co tribute to your Patreon account if you have one. This is great content!
Where can I get all the gauges you are using? I believe some are PTG but I wanted to see if you sold them all as a kit or similar. I do a all my own work for bolt guns and I'd like to start working more with gas guns. Seems like these are very handy for diagnosing issues. Actually are those just gauge pins I can get at any mechanics/engineering supply place? if so which sizes do I need?
I'd love to see a high end engine builder, manufacture an AR. Because they are obsessive with correct tolerances.
Thanks for the video. What don’t you like about nickel boron?
What’s the deal with the YFS fasteners?
Good stuff
Can you send me the places where too purchase those various gauges, this way I can verify that when I get a new bag that it is good. Thank you!
Shouldn't the staking have prevented this? If not, what is staking actually for, other than people to argue over on the internet?
Staking prevents the screws vibrating loose. It does nothing in regards to the clamping force exerted by the fasteners.
@@timturner7609 shouldn't proper torque also prevent the fastener from coming loose?
@@ScottKenny1978 yes. In theory. It's like how they use safety wire on racing motorcycle bolts so if they come loose, they still can't move. It's just an insurance policy because those bolts don't have much room on top and get subjected to the entire recoil impulse of the gun
When firing pin protrusion is not enough or too much it would be good if you told how to fix those problems.
He explained it in the video. You can shorthen it on a lathe.
Why not tap the gas tube screw holes?
That BCG showed all the same stuff that my 200+ spike’s tactical BCG is showing after maybe 800 rounds
I think a nickel boron is ok for barrels but not bolt carrier groups. The black phosphate coating milspec bolts have is good. I've had no problems with my non nickel boron coated BCG's.
Man, i wish you had a capture card for your Boar scope PC...
Ive thought of making the same suggestion.
A little mineral spirits and a tap can get those threads looking Purddy in no time.
Where can i get these gauges? When I search all i come up with is chamber gauges
If companies had this level of quality control
Mike would be having a hissy fit and a rant.
I just got an original tool craft bolt head in the mail today. How would i send it in to see a video about it?
So who make a good bcg that's reliable then? I was under the assumption they were pretty good
It would be nice if you could include the approximate round count on submitted BCG's. Also, you said you were going to do a physical on a Radian BCG a little while ago so looking forward to that.
Is there anyway you could list the gauges used and where quality ones can be bought? Im going to SDI right now ans starting my journey into gunsmithing. Would like to initially get whats needed for 5.56/.223 and 9mm
Just so I don’t do that how do you recommend I clean the bolt. Thanks
Any time a component with threaded holes is plated is MUST have a tap run back though to be sure the threaded holes are free of obstructions...
That's pretty basic.
What are you using to check the key hole?
Where can you buy all of these essential tools? I’m currently going through the process of becoming a legit gunsmith and would like to eventually open my own repair shop! Thanks in advance if you don’t mind giving me some answers. I love your videos and get in trouble with the wife every night because I can’t put the phone down once I start watching any of your videos.
Pacific tool and gauge sells a lot of what he uses.
It's all standard gauge pins and holders used absolutely everywhere in manufacturing. Ring gauges for the bolt tail. All you need is the Go NoGo and Field measurements.
Now I have buyers remorse for buying a fail zero..don’t even want to look at mine to find out if it’s botched
How can you replace the gas rings? It would seem to me that eventually they would wear thru use.
They're straightforward to replace, about $3 a set. Remove the old ones with a pick then needle nose pliers. Install is a little delicate, lots of videos online and inexpensive to try again if you break one.
Welp... looks like im upgrading to a sandcutter and lmt enhanced bolt now...
On another note im actually legitimately surprised this bcg failed so badly, I have 3 fail zero bcgs in 3 different rifles all roughly sitting around 8k rounds each and haven't had a single issue, this includes about every 1k rounds doing a full bolt tear down and doing some basic gaging and inspection, though nothing like this, suddenly feeling like I should though.
What is the best finish on a bcg from your experience?
Love watching this content- but have a question as a noob- You measure the total length of the carrier for spec, but when firing pin protrusion was a little short and the potential cause was short bolt length- why didn't you measure the bolt to confirm it's length spec? Thanks for the vids
The bolt's length doesn't determine how far the firing pin protrudes from it. The depth of the coreesponding shoulders of the firing pin hole in the bolt does. The bolt could be a quarter inch longer than it needs to be, and as long as the firing pin can slide down it far enough, it won't effect protrusion length.
As a weird analogy, if I asked you to sit in your car and touch your front windshield, it doesn't matter how long your car is, what matters is how close to the windshield your seat is.
If your not at fan of Nib what do you like?
Phosphate and NP3