2 in one day!!! Let's gooo

These are made by Microbest, so seeing them get high marks was not a surprise to me. I don’t know about ALL of the Expo arms labeled stuff, but most Expo stuff I have come across is made for Expo/Primary Arms by quality manufacturers

I imagine that shooting one of Chad's ARs must be like squeezing butter. Soft and smooth.

Expo arms sales after this ⬆️

@DevDog67

Жыл бұрын

That's kinda what I'm worried about lol. I like their stuff, it's reasonably priced and in stock.

Primary arms has done a pretty good job sourcing parts for their expo arms brand

I’m so glad you’re putting out videos again. I learn a lot.

I just found this channel and between this and the young manufacturing chrome, you’re the only one answering questions I have about the nitty-gritty of the quality. I got one of these expo arms BCG on sale for a bench shooting clone, can’t wait to watch

@travisbrock1383

Жыл бұрын

Yessir, this man is makin them do better.

@VanXHydrA

10 ай бұрын

I just got one on sale for a new 13.9 build upper I am doing for $119 on sale during Labor Day, I am glad I watched this. And i like the fact that its not super reflective.

@tedisabum

7 ай бұрын

Same. I'm replacing the extractor with a BCM and upgrading the extractor (5 coil) and ejector springs with Sprinco@@VanXHydrA

Back with a vengeance. Love it.

And Chad is the Bob Ross to my ar15 world a happy review here and a happy review there.

@bob_mosavo

Жыл бұрын

What would you call a "happy accident" in your AR 15 world?

@buellboy007

Жыл бұрын

@@bob_mosavo 300-blackout

@bob_mosavo

Жыл бұрын

@@buellboy007 🤣😂 What were you boring a 5.56 chamber and made it into a 300 BLK 😂

Thanks for the EXCELLENT content. Miss seeing the shop kitty though.

@RichardCranium321

Жыл бұрын

you dont notice anything missing???

@SchooloftheAmericanRifle

Жыл бұрын

He tried to get into the shop while we were shooting this video but didn't know till we were done shooting. He hasn't been in a shop mood lately.

Thanks for great videos. It's like waiting to go to Disneyland waiting for videos to drop

I have a few of the expo chrome lined barrels. One has near 7k through it. Everything I build is built for heavy use. I wasn't expecting it to continue to be as accurate as it has been so far.

Thanks

Expo arms is underrated. I have some of their barrels and a few handguards.

@jackbauer4186

Жыл бұрын

Expo (aka Primary Arms) basically takes high quality USGI manufacturers products and sells them as their house brand at a very good price, especially their BCGs and barrels.

@CarlPapa88

10 ай бұрын

Just saw today, they have AP's 16" 5.56 Atlus for -$50 than AP has it listed for.

Chad, you never seize to amaze me. I'm glad to have these videos to reference because even after having watched it, I come back and learn something new. It was something that I don't remember having been brought up in class. Your videos, instruction, and tutelage are really invaluable. Thank you. I'm honored to be a SOTAR Alumni.

Man I’m gonna be spoiled now! Two videos in one day & on a Monday as well to start the week! It’s officially gonna be a good week, lol. Thank you brother!

@SchooloftheAmericanRifle

Жыл бұрын

Two more coming today or tomorrow.

@dancarter7009

Жыл бұрын

Oh man, that’s awesome! My day/week just got even better! Thank you ( & the family of course) for all your knowledge sharing, time & effort to educate us all. Greatly appreciate it brother!

@gregrn779

Жыл бұрын

@@SchooloftheAmericanRifle Crap 💩, I just saw that I’m “like 👍🏾”number 666! Now I need to go check on the lengths of all my BCG’s…😅. Just to make sure…

I’m stoked, 2 videos today. Thanks for the thoughtful content.

Best channel on KZread, hands down.

Great video thanks for all the info!!!

I really enjoy your videos

Just the info I've been looking for. I've subscribed. I've been building my own AR's for a couple of years. All of my BCG's were bought complete but one. Your videos reveal just how important a correctly built BCG is. Thanks for your videos!!

Excellent review I love learning and you explain everything perfectly.

Just purchased one of these Expo chromed bcg and was looking for a video on their quality. Thank you so much. Subscribed!

Amazing channel I'm hooked

Another great video, thanks

And one more for the all mighty AlGoreRhythym! Great video as always my friend💪🤙🇺🇸

These are always on sale for less than $90, nice to have a source other than Reddit

@justindawn3428

Жыл бұрын

The blem were on sale for like 85 bucks

@matthewbeaver5026

Жыл бұрын

@@justindawn3428 what's the blem tho? Extractor pocket? seems they could've corrected that with a diff extractor. Maybe the chrome layer is thinner than normal. Looks like everything else was checked.

@justindawn3428

Жыл бұрын

@matthewbeaver5026 when I bought them I couldn't really find anything. One had a faint little scratch but nothing that I haven't seen on higher end bcg 1sts

@ImpactTurns

Жыл бұрын

@@justindawn3428 most definitely, Primary Arms seems to put them on sale every other week

@ImpactTurns

Жыл бұрын

@@matthewbeaver5026 Haven’t bought this BCG, but I’ve bought a few “BLEM” products: a PSA AR and a couple of Radian Raptor charging handles. PSA AR had a faint scratch on the left side of the upper and the charging handles didn’t look different at all. None have had any issues.

It's so good to see these notifications again

So much goes into these aside from whatever logo is engraved.

Love this content!!!

I just bought a “blem” one of these too, good to see it’s not a bad bcg to have around

Excellent video, Brother 👊 ... priceless information 😉👍🇺🇸

I’m glad your sharing your knowledge. I’m planning on building my on AR here soon and have been watching and learning what to look for in parts and where problems tend to be. Thank you for all the awesome videos.

@VanXHydrA

10 ай бұрын

You cant go wrong paying attention to this man, I've not watched him but for a few months, and He has taught me a WHOLE lot more than i ever learned watching guys shoot. The fact I've taken a basic Manual Machining Course and completed it at a local Community college helps me to understand the significance of the gauges and testing he does here. And I understand BCGs WAAAY better than ever before. As well as Barrels and the whole AR system

Arf-tac has microbest carriers on sale for 139.99 for hard chrome, phosphate gas key, OCKS screws, sprinco extractor and ejector springs. Imo best bang for the buck on the market

Thank you for sharing this in-depth information. I'm thankful for this element in the present Age, receiving expert training in gunsmithing is a literal Blessing. Many Happy Returns~

I love my retaining pin removal tool. 👍👍Glad to help your kids out. Will buy some more.

Have you ever thought of doing a review and breakdown comparing some of the popular BCG's? Also I've always wanted to see a high-end to mid-range AR comparison. Would be nice to see them stripped all the way down and inspected.

My gf is always complaining that my protrusion is inadequate.

WHAT A GREAT DAY. I just bought 3 of these BCGs!!! Great review

@LKaramazov

Ай бұрын

So you aren’t worried about the defects he mentioned?

@team_character

Ай бұрын

I replaced the extractors on mine and am happy with them!

Amazing info!

I just got one of these recently, chrome lined and phosphated, for $75 through PA. What a steal.

Have one love it. I’m using my old used colt bolt in it, and it’s totally fine

I’m definitely going to have my local gunsmith spec out my chrome BCG for my XM-177E2 build!

Thank you!

white label makes some nice bcgs! hopefully you can do one of those eventually!

That little handheld torque wrench looks very useful. Saw the same one at the shop nearby probably gonna pick one up

@ZeroTooL88

Жыл бұрын

Love my fat wrench, go to screw driver for all gunsmithing now. Most manufacturers list proper torque for red dots and such

@chuckfinley3152

Жыл бұрын

They are great, just remember to unwind them when you’re done lol

Eventually the masses will realize microbest makes the best BCGs available

nice show, i am impressed, keep on.

Another great video. Would love to see how you are going to bore out the extractor pockets.

Thank you.

Thank you Sir

My audio is working. Primary Arms was selling blems. Wonder if these are the same... Thanks Chad, been on fence about my less sharp chrome extractor. As it's going in a carbine length gas its going curn side now.

Some are complaining and have said that replacing "good parts" is stupid. I ask, what parts would that be? The springs? Many companies put cheap ejector and extractor springs in their BCG's. Replacing them with known quality springs smart and an upgrade. The screws? The OCKS have twice the clamping ability when staked. It's an upgrade. The carrier keys? One was badly misaligned and all 3 had a poor seal between the carrier and key. Insufficient gasket material was used and all 3 had wavy surfaces. This creates inefficiency. The ejector roll pins? They shouldn't be reused. The 420 pins can be reused and are more corrosion resistant.

@justindawn3428

Жыл бұрын

I didn't see anyone griping. But if they did whose business is it of theirs. Customer asked for upgrades. Would the stock products work? Yes. But the upgraded parts will work better. Just like a car not everyone keeps it as the base model.

@SchooloftheAmericanRifle

Жыл бұрын

​@@justindawn3428there were several nasty ones targeting you. I deleted them.

@justindawn3428

Жыл бұрын

@InstructorChad oh I guess I missed them or didn't notice. Let people gripe. What I decide to do with my parts is my business. If I can make something better I will.

Please start posting on the regular again! Missing your content.

Expo arms seems to be of very good quality in general. I have a 13.9” p&w upper that is excellent. It has a Rosco barrel, Keymo mount flash hider, and overall seems to be much higher quality than the $250 sale price I paid. Thanks for this, I am now on the hunt for chrome or phosphate BCG’s since the nitride sucks…lol

@seanoneil277

Жыл бұрын

I understand that Mega Arms makes the upper and lower receivers for Expo, and that the Expo uppers are thermofit just like Mega and BCM and a few others. I've got an Expo lower that fits very nicely with several different uppers, and was very simple to build up. Primary Arms is doing some very good things these days.

@Whitefeather83

Жыл бұрын

Some of the expo rails r made by cmt.

@Neil.Anblomi

Жыл бұрын

@@seanoneil277 There are two different oem’s for Expo receivers. The ones with the “glossier” ano are Mega oem.

@starxlord9856

Жыл бұрын

@@seanoneil277 bcm p&w are legit! Lightest rifle I own and the mid length is so smooth and it’s all top quality. Solgw is also a favorite of mine made a 11.3 build with all of their parts. Top notch stuff

@seanoneil277

Жыл бұрын

@@starxlord9856 There's quite a few good options, it just takes a bit of time sifting wheat from chaff. Because there's a lot of chaff too. And it depends on what you want from the rifle. For a range blaster sending rounds into a berm -- not me, but those folks are out there -- the choices are pretty easy. If your needs are different, the choices get narrower and critical for what you plan to do. I like BCM upper receivers and any others that require thermofit. But a lot of folks find that thermofit annoying, for reasons I don't get. Easy precision improvement, not hard to do. Just watch the JP Rifles video on it. Easy as it can be.

I love your content, I'm an auto technician so I have a lot of respect for the process. I am curious if the diagnostic procedures are any different for 308 dpms systems (ar10), thanks for your time

Well done Sir.

That clicking sound when you measure the shoulder spot on the bolts that like raised section almost looks like a belt on the bolt. I like that clicking sound the measuring device makes when it stops at its measurement. It’s such a satisfying click sound. How does the measuring device click when it hits the item it’s measuring

I'm just jealous of your gages and gaging. It's the Quality Inspector in me.

@justindawn3428

Жыл бұрын

I keep trying to buy them as I go but damn 100 bucks here a 100 bucks there

Another excellent video, Chad. It's funny that no matter how many times you say efficiency is all that matters you still see comments asking for brand recommendations.

@SchooloftheAmericanRifle

Жыл бұрын

I can't win my friend. No matter what I do people complain.

Those are super nice “blems”

I love your channel. This is a strange question, but do you have a checklist that we amateurs can look at? Not everyone is a talented gunsmith like yourself, but being able to look at our own rifles and say "That's not right" could be good information. By the way, my DPMS and Colt have the chrome lined BCG's, and that makes me happy knowing those are good to have.

@blueeyeddevil1

Жыл бұрын

Watch the videos; take notes and make your own checklist if you feel the need. Isn't it enough he's putting this info out for free to everyone? Viewing his videos helps him out with YT algorithms, so it's a small way of "paying him back" for these valuable services. It's also a way to move up from amateur status by actually leaning things, instead of relying on a cheat sheet.

Hoping this goes well for my sake.

@justindawn3428

Жыл бұрын

Loomed like it went pretty well

@freedomforrealz5969

Жыл бұрын

@@justindawn3428 Dollar saved is a dollar earned. Couldn't be happier

I’ve found that properly lubing your Johnson helps ensure adequate protrusion. Just my 2c, though.

Good to see you posting regularly again. Does the tests and information about changing over extractor springs and others and most of the dimension’s and information carry over to a 7.62x39 ar platform as well

@SchooloftheAmericanRifle

Жыл бұрын

I use Soviet AK Gauges for 7.62x39 bolts.

@icantsaywhat

Жыл бұрын

@@SchooloftheAmericanRifle When you open up for taking on bolt carrier groups again would you take on a 7.62x39. I’d just be curious to see how mine checks out.

Does it make sense to have a highly polished firing pin tip? Usually the tendency for cracks and wear would be reduced. Is there a specific reason not to do it when the shape is the same? Thx for the video and great camera work.

Omg 2 vids today!

In my comment 9 days ago I mentioned I purchased this bcg and I really like it but I am having erratic ejection patterns, sometimes it could be 1-2 o'clock and then a 3 o'clock. My question is, could the extractor or extractor spring cause this or possibly the ejector spring? There are no feeding or ejection issues except for the erratic pattern. I understand without you physically inspecting the bcg it's hard to give a definitive answer but wondering if that is possible. Thank you, I appreciate your wealth of knowledge that you share with us here.

Damn, one of my secrets is out!! Ohhh well, happy others can use these as well

Thanks for all the good work Chad. You mentioned 100 inch pounds is the torque spec for the carrier key screws. Is there a change from the 55 to 58 inch pound spec that we’ve all heard about in the past??

@SchooloftheAmericanRifle

Жыл бұрын

100 in# includes the staking. Screw torque is still 55-58. The staking is what adds the extra "hold"

Were those gauges you used called a ‘carrier three bore checker’? Those look really handy. Where might I find a set of those?

So what bolt carrier group do you get excited about that comes with your preference of fasteners and springs?

I'd love a physical of my Chrome Wilson Combat blem

wow these carriers are WAAAY better than i thought. definately gonna be picking some up for builds. puching well above their weightclass

@justindawn3428

Жыл бұрын

Can't beat 94 dollars

@99cobra2881

Жыл бұрын

Sitting next to my Solgw the expo looks identical Chrome looks the same staking looks the same bolt looks the same Theyre both microbest afaik

@nicholassmotrilla8795

Жыл бұрын

I would give the warning that the qc is not 100%. I have sent back two of these bcg before giving up. The first had a burr or other defect in the cam pin channel that led to a deep gouge on the pin with less than 28 rounds through it. They replaced it for free, sending me a bcg that had a large dent on the rear of the carrier. It probably would still have funcitoned, and I could have even groud it down. But that would remove the coating, the reason I tried them, and after striking out twice I just returned that before firing it and didnt ask for a third.

@jstud999

Жыл бұрын

Eventually the masses will realize microbest makes the best BCG’s hands down

@ReticentIndignation

Жыл бұрын

@@jstud999 Problem is, where can you get a microbest BCG? I can't seem to find a distributor/supplier...PSA has them out of stock.

These are on sale right now. Look them up.

@justindawn3428

Жыл бұрын

They had em on sale for like 85 a little bit ago. From the review 94 right not a bad deal

Has anybody spec’d a brownells chrome BCG?? The 2 I ordered got sent back. Both 3-bores were .252/.500/.531 & .253/.500/.531. Cam pin holes were .313 & .3125~. Thanks Chad, you’re a good dude!

@vgt

Жыл бұрын

Just going off of the specs and what I've seen online, the Brownells chrome BCGs don't seem like they're worth the money over these Expo Arms chrome BCGs. The OEM for the Brownells BCGs is Azimuth, supposedly, and they have 9310 bolts. Expo Arms chrome BCGs are made by Microbest with C158 bolts. Your experience is also another data point pushing me away from Brownells BCGs.

@JimyoVibration

Жыл бұрын

@@vgt I bought a microbest phosphate and chrome. Sent both back. 3bore was alright but I had chrome pitting all over the bolt tail. Phosphate had bad carrier key alignment, and the finish on the bolt was quite mottled. I found the best in AO Precision, thus I quit the search for chrome. I have like 10 AO Precision BCG’s

I believe these are manufactured by MicroBest and are known to be of pretty good quality. I should have grabbed a few when they had the 1 day sale on blems!

@justindawn3428

Жыл бұрын

That's what I did. I think they still have blems for 94

@shojus

Жыл бұрын

@@justindawn3428 Nice, thanks 4 the heads up

@AstraZero7

Жыл бұрын

They are infact micobest. I have a Daniel defense and an expo and they are identical

@justindawn3428

Жыл бұрын

@@AstraZero7 just goes to show how much more they cost because of a name put on them. I haven't compared my dd to expo. But I do know my dd was alot more

@dustinhill330

Жыл бұрын

They have them on primary arms right now 👍🏼

Have you done a video on how to fit a gas tube?

What gas keys and extractors do you use when replacing those parts as an upgrade? Do you mic on receiving those parts? And Is there an upper receiver 'jig' you use when torqueing down the gas key screws so the key stays aligned with the gas return tube (homemade? otherwise?)?

Do you only have videos on the "full semi automatic" AR15 or do you do physicals and autopsies on the select fires too? The tolerances and tests of select fire gunsmithing seems hard to find.

With a springcos and donut would 2000 rounds through make them broken in like a trigger on a glock basically

What extractors do you recommend? Also what sealant do you use on carrier keys after stoning?

Thanks for the videos! I do quality control for a shop that makes BCGs, so I've seen a ton of customer supplied prints with varying geometry. Which makes me wonder, where do you get your dimensions and tolerances from? Are you pulling numbers off the government drawing? And, if you don't mind, what sizes are the pins you use for your 3 bore diameter checks?

@blueridgewarden2838

Жыл бұрын

He's pulling from the TDP if I had to guess.

@chuckfinley3152

Жыл бұрын

He says it in the video

@ChristopherGoggans

Жыл бұрын

​@@blueridgewarden2838 he's explained it in bits and pieces over a ton of different videos over the past several years. In short, it's similar to the TDP data, and it's a good starting point, but he's departed from their dimensions in some small ways, and has come up with his own tolerance standards for some critical dimensions to class as efficient VS somewhat, to very inefficient. He also emphasizes that the important value is often the combined tolerance between two parts such as the carrier bot tail run, and the bolt tail that determine the overall tolerance of the system. I hope this helps and makes sense.

@MrTylero28

Жыл бұрын

You’ll need to take a SOTAR class by Chad himself to gain all of his specifications. I’ve got a couple friends who’ve attended his classes and they all have nothing but praise to sing for not only his knowledge but his personality as well. One day I’ll get to a class with you Chad!

Hi Chad, forgot to ask,where do you source the 420 ejector pins from? Thank you sir

Should the inside of the carrier key be chromed on a chrome bcg?

I picked up one a few months ago I switched extractor to a bcm an 5 coil springco... i think it was only 100$ shipped...

Something I've seen once or twice and really wondered about every time. I've seen a couple bolts with 2 ejectors, each 180° from each other. I think you've even had one on camera before but didn't point it out (I think it was the "what's my favorite type of BCG" video" I assume it's a gimmick or possibly even detrimental but I'm still curious about it.

Have you ever done Any AR Stoner (midway usa) parts/guns..

Of the unused parts replaced which ones would the average owner reasonably keep as possible spares or replacement parts?

What are your thoughts on piston bcgs, like pof-usa, lwrc, lewis machine & tool, etc.

Dammit now everyone's gonna buy all the expo arms chrome BCG's🤣😂 those are my go to BCG's

I watched the video where you ran down the gamut of BCGs from the most efficient to the least. I get that the chrome ones tend to find your favor. Is there any possibility of getting you to name your favorite? That wouldn't be a recommendation anyone could hold you to blame for if it failed. You just have a favorite. Would love to know it.

@schooloftheamericanrifle where did you get the go/no gauge set?

Is there a resource that has proper dimensions for the bolt and carrier?

Thanks school of the american rifle. This is off topic but It's interesting question for those like me who dont know. If you have a inefficient Gas key, can you swap the inefficient gas key with another brand that has a efficient gas key for a pistol? And is it at all possible, to convert a right hand pistol bcg into a left hand pistol bcg by flipping it or something?

Hey Chad, I completely understand your confidential specs and I respect that, however I know you do give out some specs here on KZread could you tell me if you use plus or minus gauges? And if you only had the money to invest in 1 set .11-.750 what you you go with plus or minus?Understand if that’s confidential too. Anyways Thanks for the great videos as always.

Fully chromed just like Stoner designed

I have audio and video. Refresh guys

Are the measurements for these various gauges, especially the gas efficient/inefficient ones, listed somewhere?

Chad, I'd love to see you test a White Label Armory BCG.

@justindawn3428

Жыл бұрын

Me too. And black river tactical. Might get some just to send him

@Neil.Anblomi

Жыл бұрын

@@justindawn3428 I don’t know about white label but brt is a Microbest bcg so it should gauge out just fine.