That is the first time I've seen anyone go through all of that stuff. Very interesting. I carried an M16 in the Marines, have had multiple ARs over the years, have built several of them and done numerous lowers and have never seen so much cool stuff all in one video! Very well done! Love the demagnetizer!

Exceptional video, as a retired Army Senior Small Arms Instructor, Aberdeen Proving Grounds. This has to be one of the best maintenance series I've yet encountered. I am intrigued by your site and have subscribed. I look forward to your next offering. Well done good sir, well done...

Today I learned buy once cry once .

I just wanted to tell you , I really appreciate you taking the time to make these extremely informative videos, I don't ever remember another KZfaq channel being so thorough..

every time I watch one of your videos you have a new tool

Best part... No, that wasn't a gun going off in the shop. It's fireworks, it's my neighbors celebrating their freedom on the 4th of July, and no I'm not going to call the cops like a Karen, I'm going to join them! Hell yeah!

Your channel inspired me to do an inspection of a mystery meat BCG I bought years ago for $45 bucks. I think I should retire it before I hurt myself.

Nice test gadgets. Thanks for sharing.

Love your videos. Your knowledge has educated me tremendously. I applaud your attention to detail. Thank you.

I fear a ton of crappy ARs coming to market because of the recent panic buying. This is how the Chinese AR parts got into circulation during the last panic :(

wow, i am so glad I found this channel even if we aren't allowed ARs where I live. Knowledge is good.

Just stumbled accros this channel. Absolutely amazing information. Thanks !

"I've explained it many many times" ~ Yep, just as I was about to ask the very question. So repeating it does help. I really appreciate the video's you make, I was a tooling inspector at McDonnell Douglas and love working with inspection gages and tools. I have just in the last few years gotten into the AR platform, was a .30 cal guy for 30+ years.

Just found your channel and I am really enjoying your work. I've always been interested in learning more about the inside of my weapons systems and their functions. Thanks for the dats

I think I've watched 3 or 4 of your videos in the last day, and I've learned almost as much about the ar15 as I have in the last 3-4 years. Keep up the great work

Happy Independence Day America. Thank you once again. I have been inspired to do similar inspections on my collection of firearms and building new firearms. I have purchased many additional tools recently, many of which have been featured here on your channel and also some from Marine Gun Builder. For more than 50 years I have been interested in firearms. Now retired, I have the time and assets to further pursue my interests. What better way to celebrate our country’s independence than by ensuring that we have the well maintained tools to protect and defend it.

Very, very interesting indeed! I absolutely love these in-depth videos. its a shame that KZfaq will not let you show the machining steps.

I'm impressed with your knowledge, keep up the good work

Chad you point out things like the rounded back edge of the BCG surface that engages the hammer. I wouldn’t have noticed that but understand why it is important. Thanks!

Very informative, I learned what to look for on BCG wear & tear.

I remember my FN M4A1 at basic training had a magnetic bolt and/or BCG. But they use copper-jacketed bullets only.

Those gauges you use to find out of round holes are brilliant.

You just answered my question on why check for magnetic parts.

Glad i found you, i am learning so much!

Always informative.

A Grand Master!

Very Efficient and thoroughly done!!

Love these videos

I'm learning Alot. Thanks for this video. 👍

I was thinking about getting one of these to put in the range bag as a backup.

I know how my ar works... but watching you for 3 of these videos showed me what can go wrong and why. I had a limited understanding but I've learned a lot. The cam hole can stretch? I dont have the tools you have but at least I know what signs to look for and what it could be. I'm happy to know that my manufacturer has an excellent reputation for quality control but I'm gonna stay on top of things as best I can...at least now I have a better idea of what to look for

VERY PROFESSIONAL, PLEASE DO A TOOLCRAFT BCG REVIEW

Very interesting. Do you have gauges to check large frame AR10 style rifles? Would be cool to see if some of the premium manufacturers are worth the coin. Thanks for putting out these informational videos.

When firearm quality is compared to automotive quality, the firearm industry is a hard failure. If 2% of automotive components failed in a similar manner, I would be instantly fired. If 0.2% of the automotive components were like this, there would be endless meetings and "help" given. The process controls in the firearms industry are garbage, although the military does have much better process controls and a TDP that are bot enforced. Civilian guns have garbage quality controls. I've had the experience of testing handguns and rifles for acceptance and legal purposes. The results are not pretty. The dishonesty in firearms marketing is creepy. Lies, lies, and more lies. Many "experts" are paid off or are useful idiots. It is refreshing to see people like Chad do the right thing. Facts do matter. The only saving grace for the civilian firearms industry is that 99% of all guns see less than 50 shots in their lifetime. I made up that statistic. An unused Taurus handgun will never fail. A safe queen AR will never fail, because it is never used. Imagine the warranty horror for a civilian AR company, if every owner fired a small amount like 1,000 rounds through their AR each year.

The best info hands down.

I could have missed this in the video but I would like to know the round count of each one of these products you dissect Sir. Also, it would be cool to hear your overall opinion on these products or an Opinionated rating scale score. these are unique and informative thanks

Very happy to find this channel. Just recieved a complete upper from a dealer online out of Georgia and the bcg has some things that worry me. No MPI marks on bolt. Cam pin very loose in bolt as it almost undersized. Also I can't seem to find out exactly what spec bcg they use in there builds...lol. where is your shop based out of? Would love to send in a few things for inspectiong

We all know they are just as good as DD, says every poor!

Would love to see a check-up on a PSA BCG. All the ones I've ever used were GTG :)

Been watching for awhile first time commenting love all your manufacturing level equipment you have to work with. but I did have 1 question at the beginning of the video when you compared firing pins the inadequate protrusion was attributed a defective firing pin but later in the video when you measured the cam pin hole in the bolt from my point of view it showed bolt stretch. in your opinion could that account for the protrusion issue. Just trying to understand if firing pin was actually out of spec as well as the bolt. Great video as always very informative

Good stuff

This is why I stick to BCM and Daniel Defense. Never have any of these issues!

Thank you for the quick reply for information regarding the iGage gauge. So, since it is a fabricated part, and I like numbers reading, the no-go or go reading not good enough for me, precise reading better. I will see about having the one small piece fabricated for me by a local gunsmith, but one problem, measurements. So what is the dimension of that piece if you know or recall it and the part used for fabrication? Thank you!

On all of mine the cam pin and bolt are tapered so the bolt can be installed so the extracter is on the right side

I just found you channel and have been plowing through your content. I'm curious if you have any autopsies from redxarms?

Are the extractor gauges from PTG also?

I noticed a tub of mobil 1 grease, I am curious what you use it for?

Please do aero precision

Where can we buy some of these gauges ? Pretty interested in the Bolt gauges. I'll keep checking the other videos to see if the info is there as well. Just figured it might be quicker to ask.

Links to the gauge sets you are using? Or did you custom make them?

First time I seen the Bolt Face and Cam gage. Not sure if I missed it on other videos or if these are new tools.

I'd really like to hear your thoughts on imported steel ammo, and the effect that it can have on your rifle

Are these go/no-go tools available somewhere?

Because im poor i wonder if my budget ar 15s could benifit from lapping compound on rough surfaces in the three bore area if one was careful and had the proper bore scope to find rough spots ...

I'd like to see that bolt run until failure

Hello, Do you feel that the or a product like the Wilson Combat enhanced extractor is worth using, regardless the cost?

Would you ever recommend the use an insert and donut? I have a BCM 11.5" upper with a carbine length gas system.

Have you done physicals on Palmetto state?

Did you make all those gauges yourself?

Which Sprinco to go with? The 5 coil, or 4 coil?

Where can one purchase some of the tools you are using to check out the BCG and its parts?

I just found this channel. I'm amazed of your knowledge sir, appreciate all your videos. How much does it cost for you to check AR's out?. Also what bcg would you recommend may i ask?. I've got all colt bcg's but im aware of no company is 100% in mfg they're wares. Thanks again bud! 👊

Would be interested to see how many flaws you can find in my DD with a thorough inspection like this.. Something to start with the bolt catch can't properly reach the follower of multiple different magazines so it jumps over it and shears the edge of the follower off.. Resulting in the bolt not locking back on an empty magazine and sometimes getting the magazine stuck when the bolt catch jumps over the follower.

I have a question based on the review of YFS fasteners. I have a brandnew AR in which the gas key is equipped with a YFS fastener. Single screw because it’s a SFAR (SHORT FRAMED AUTO LOADING RIFLE and it is chambered for 7.62x51 NATO /.308 WIN. The YFS screw is staked both sides but I know they are notorious for failure. Should I swap it now and save the heartache or wait?

I wonder if Anderson is using the sharp shoulder om the bolt-to-hammer interface to delay the bolt unlock fractionally, in the same manner that on a 1911 in .45 Super the square bottom on the firing pin retainer plate delays the unlocking on a 1911? If not that, it might just be sloppy machining on the carrier.

so if you have to replace the bolt, do you have to replace the bolt carrier group as well?

Can the chrome lining in the carrier be polished to improve the surface?

Firework got ya heh? Lol. Great stuff thanks sir.

Looking forward to you doing a physical on a giessele carrier. They're supposed to have a really good finish inside due to the special machine they have to do this.

For someone just getting into AR builds... Where would be a good place to find an assortment of general go/ no go guages?

Question: When replacing the bolt carrier for a completely new one is there anything we should worry about, is it plug and play? Been looking at a Radion BCG I'm not sure.... Thanks!

Anderson video, "uh oh," "oh dear" "oh, that shouldnt happen" ....

How many rounds has it fired? And was it still magnetized from the MPI process ?

Technically shouldn't this video be named "autopsy" due to the gas key screws failing the reverse torque test? Among the several other smaller issues.

looks like a stress crack over the cam pin hole

If it's so important that the gas key and carrier stay together, why don't we just make those in one component?

Chad, I'm sure you've mentioned this in other videos, but why do you not like to see both the o-ring and the extractor insert?

Fat wrench and every Snap-On both recommend winding down their wrenches.

HOW MUCH FOR A CARRIER AND BOLT ACCESSMENT DO YOU CHARGE?IF I HAD THE TOOLS ID DO IT MYSELF, MAN YOU HAVE NICE TOOLS AND ARE A GREAT TEACHER!!!!

So, new firing pin, new ejector spring, barrel is clocked in the upper receiver, bolt tail may be undersized, new extractor spring, camp pin hole is elongating so whole bolt is toast, magnetized parts, gas key is a bit oversized, gas key screws were loose so needs a new gas key and screws, and the whole carrier is a bit rough inside. My first priority would be to fix the upper, so that when you replace the bolt it's not getting beat up. If I have the cash, I would do both at the same time.

I would also like to know how much for a bcg autopsy please? Thanks

I heard YSF fastners were stronger than MOAKS in one test by a youtuber. His theory was staking one side at a time side-loaded the screw head weakening the screw.

I have a aero precision bolt that I would like to get tested

Today I learned that the gas seal on my bolt might be bad.

😆 “I’m not a Karen.”

Hey Chad, can I send you an out of spec BCM barrel nut?

23:20 Agreed 100%, as of now, it's plenty enough of Karens out there :] I am not American, but - Happy 4th of July! Love your channel - attention to detail, failure points - knowledge & experience in general. I learned many things watching, and for that - thank you!

Who do you think makes the best BCG's ??? LMT? Toolcraft? JP? How would you rank your top 3 BCGs ???

This was at 300 rounds?

Hey I got a bca bgc laying aroind if you want to do a video on it. Maybe 300ish rounds through it. I don't use it anymore but if you're interested lmk!!

HI ! I have an AR15 that I broke the front sight , gas block off. It's an A2 style just the base is left , Can I replace it with another A2 type sight ? I have one thats used , and alredy drilled ,it was police surplus that they took off new rifles to put on low profile ones . I really want that type sight , Thanks

What causes bolt parts to magnetize?

Bolt tail and bolt ware is definitely from the owner cleaning with wire brush. Fudd stuff

Man I like Anderson I would like to like them more but when their stuff is tested it is usually crap.... 😢 I have some uppers and lowers from them but have never dared to buy their barrels or bcgs.. gas block is as lowbas i will go.. it's to bad because its like buying a American made car. Compared to buying a Toyota... We want to buy American but we have to buy Toyota for real quality.

Forward assist cuts look angled.

You can demagnetize tools with a magnet and a drill. EDIT: of course you already have a demagnetizer 😅

Got the first view!!!

And that is why you buy a BCM

You have just convinced me in why an AK is better. Russians don't care about aircraft specs on a gun. No offense , truly. Good vid, man !

F