Donna laughs quietly at Chads attempt at a "1 man" operation.

Wow. I think this is the first video I've watched that's literally saved me several hundreds of dollars as I was planning on buying a number of bcg's with built-in gas keys.

Thanks for continuing to put out the educational content. I’m sorry you have to suffer thieves in your classroom and idiots on Facebook. I hope you’re encouraged by the positive responses to persevere through the burn out. Can’t wait to make that trip to the SOTAR classroom.

There always educational. Having been a machinist for 30 yrs your vids have been absolutely informative Thank You look forward to more.

I'm happy to see I'm not the only one who is very particular about truing and sealing a gas key! I've seen quite a few builds fail to extract/cycle due to a leaking or loose gas key. Such a simple thing can really frustrate people as it doesn't take much of a leak to cause problems. As far as "budget" bolt carrier groups go, I've had nothing but fantastic results with those from AIM Surplus. They go so far as to seal the gas key, which, like you say, not many manufacturers take the time to do this step, even though it is critical in hard-use rifles. Keep up the great content!!

Someone else might have brought this up, but FWIW Colt uses and recommends Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant. Indian Head is good up to 350ºF (good enough I'm sure, temp data on the gas key is a bit elusive), whereas Aviation #3 is good to 400ºF; I just prefer the larger temp margin. Probably more germane however, is that Aviation#3 is made exactly for close-fitting machined surfaces, whereas Indian Head is recommended for hoses, paper and cardboard, and *low pressure* applications. I wouldn't feel comfortable with that. BTW, I love your channel, it's hand-down the most informative and captivating gun maintenance channel there is, an absolute goldmine. Even better that you have that perfectionist quality, the best craftsmen usually are.

get one of those tall round 50 cent plastic containers that takeout chinese or deli soups come in. Wash your stones with dish detergent to get the oil and metal shavings out of the stone, fill the container with water and store them in the container. Much easier maintenance, not as messy, and you don't need to worry about the pores of the stones becoming clogged (which is the other issue with sharpening stones). If you really want to oil them instead, use the lightest weight machine oil you can find, similar reasons the lighter weight oil will tend to "float" lighter particulates out of the stone meaning you'll have to clean them less often. Sharpening using a figure 8 movement will also greatly reduce introducing a bow in your stones, and if they develop one pick up two floor tiles for a dollar from the local home center. You can rub the three (the stone, and the two tiles) together in a figure eight pattern in sequence to flatten them, it's how surface plates were created, because grinding any three objects together is mathematically guaranteed to always result in a perfectly flattened surface.

A Figure-8 pattern is often used to hone machine parts. I'd bet that works well with carrier keys as well. Thanks for the education!

A new SOTAR video! Great stuff!

I will check your older videos, but would like to see a RUGER 556 model 8500 , basic budget AR , see how it holds up after awhile, I have one and would just love to see the good , bad , and Ugly of it . keep up the good work, I love the videos

Quality work and attention to detail. Well done.

Torque should always be applied to a moving fastener not to one that is dead stopped. Otherwise you are measuring static friction and not torque. If you have to loosen it first to get it moving that is acceptable. Likewise, checking installed torque against a fastener is not indicative of the installed torque value

I have sanded by hand a million gallons of bondo. When you level orient the part so the length match the block. Side to side you can't feel it but it rocks . Long straight strokes should level it quick.

Manual screwdrivers kill my tendons. If you get hand pain change to battery powered tools where you can. And a 1/4 in drive digital torque wrench. And check your torque drivers torque. They do go out of calibration.

Great! Thx Chad.

I always learn something new - thanks

Everyone waiting for EPC and Hodge parts to drop and I'm just waiting for the Chad videos

Have you considered Spyderco ceramic stones? They basically last forever it seems, almost impossible to wear out to a point of being detrimental for what you are using it for.

Another very informative video. And a good case against the "one piece" carrier designs. The Indian head sealant looks like what Permatex brands as High Tack or aviation form-a-gasket, we used it to seal VW block halves among other things. Great stuff. Would you recommend running a thread chaser down the bolt holes to clean the threads? Also since you mentioned, what are your thoughts on truing the uppers and bedding the barrels?

Thanks Chad for another informative video!

Well done sir, now I want a sandcutter

Glad your back! Too much hate in this world. Seems to be getting worse.

You should do a video listing tools, jigs, rising material, etc for ar-15 building and maintenance

Pipe brush for the gas key entrance hole to remove the excess green loctite.... Just an idea.

Waking up to a new vid is awesome

Where can I get these gauges

Nice head to block reference

Is it worth changing my key to a chrome lined one with OCKS screws, if my regular nitride and screw BCG is functioning properly

Thanks for the great video. When is the next 601 video coming? Are the KZfaq police trying to shut you down?

Do you have a PDF, or file for all of the go and no-go gauge sizes?

if one doesn’t have a stone as such could 400g wet dry sand paper on a flat surface also work?

I smelled that Permatex!

Do you have a video on PSA nitrite bcg review?

What bcg do you recommend for a mid price point 556 ar15?

Commented just for the algorithm......🤠

Great job brother

You or ned should sell those modded screws

Love the work you do Chad!!

That's a good trick with the new gas key. Do you think that the gas leakage with the old key could have been caused by the impact that bent the gas key?

Most of the one piece bolt carriers can still replce the gas tube.

I like names like this, Sandcutter, wad cutters, Humbuckers, etc.. They do the thing their name says.

I want to know what that small black metal container marked M1 was ? That's a handy little thing

What do you in the vice for padding?

👍🏻

Is it possible to send you a BCG to have a physical done on it? I'd love to see a video done on a Radian BCG.

Hey I have an upper I want checked. Want me to send it for a vid for y'all? Idk the process

very cool

Love seeing some good gunsmithing

I understand the theoretical value of bolt and carrier fit as it pertains to gas efficiency...but how would one really know? Has anyone developed a leak down tester (similar to what mechanics use to test cylinders and valve seats)? ... or a dyno that would measure psi in/bolt push out? Just rhetorical questions, as ultimately the gun functions or not.

Ah yes. The legend himself

Do you ever plan to do any ar10 videos or are the principles too similar to matter for a change up? Thanks a lot. I just found your channel and these are very professional and informative.

I am new at the game. Was under the understanding that a torque wrench was to be used only for tightening and not the other direction. I see you used yours both ways. Any comments would be appreciated.Thanks for the video, I learn a lot from youtube videos

Thanks for another great video.

The bolt carrier group is pretty worn but still functionally . Just curiously how many rounds been thru it BCG abused.

Hey is there any chance you could get your hands on a APF (Alex pro firearm) lower receiver for reviewing?

15:22 use a pipe cleaner?

Are you guys currently taking rifles ? I need to send mine in having issues with ejection can figure it out.

Sweet! New SOTAR vid.

I have a little bit of confusion about your initial assessment that the gas key is not knights and then your statement about knights always using sealant. Also, how common is it for people to replace their gas keys? Did this BCG see more use than the average owner?

I'll stand by the Indian Head...but taking the stuff off is something else

Was on a website of a carrier manufacturer the other day who said staking is not necessary, its just that the military wanted it. I just had my screws come completely loose on a cheaper carrier of mine and was thinking about not staking them when I put a new POF key/roller in. I do want a staking tool just cant find a good one anywhere.

Did you say Michiguns?

Please keep in mind, Loctite needs a primer if using on coated threads, or inactive metals such as, pure aluminum, incolnel, precious metals, etc. Loctite uses the metal's elemental structure to harden.

I have the biggest man crush on you Mr. Chad! (not gay)

What about if you made a bronze lap and used grinding compound to surface the carrier.

what do they use for sealant? Thanks

SOTAR. if you ever want to do a video on a different AR-15. I have a 7.62x39 and live in outside of Baltimore. I would be more than glad to drop it off for you to make a video on. If you want more information on it just let me know. Other than that keep up the great informative videos I seem to always learn a little something every time I watch one of your videos. Thank You. They are appreciated

Keep it up