SOTR literally owns YT for this corner of the educational market. Nowhere have I seen so much thorough and complete testing parameters. Science level and really appreciate it!!
I've watched a bunch of your BCG physicals. And i'll keep watching them as long as you keep posting them. Dirty hands are working hands. Working hands built and keep out country going.
Can you explain what HPT is and why it’s important? Also does it mean this has been done just because the bolt face has brass on it and it’s marked HPT?
@@highoctanehotrod HPT means it’s “high pressure tested”, which means it’s been fired with a 70k psi proof round. After that it should get MPI’d (magnetic particle inspected) which checks for any cracks or stress fractures. Having brass on the bolt face could mean that it’s been HPT/MPI. It could also mean that it’s only had some standard ammo put through it for basic function testing without having been HPT/MPI.
That is... standard. This is a bog standard bcg. I never understood why people laud SOLGW. They don't even make the bcg's, they're literally just MicroBest that they test fire with the three rounds on full auto. Big deal
I have a SOLGW BCG and have faith in it. One time I had a guy next to me at the range where his new 18" rifle build could fire a round but not chamber a new one no matter how many times he tried. He was using a standard Aero BCG. Had him try my SOLGW BCG and it ran and ran. Educated him on the importance of quality BCGs.
Aero sucks and is a joke imo! Purchased a brand new AR-10 bcg from them that did the same thing! Replaced bolt with a cryptic coatings bolt and it’s off to the races!
Great job with your presentation. I use a lot of the same tools in my work as well and have an appreciation to see them used in something that interests me. New subscription from me .
You can tell a Microbest BCG by the very obvious chrome splash on the face of the carrier. All of the above mentioned carriers have that identifying chrome splash.@@SuperUncleRyan
That's one of the realities of the market that is obscured or just not obvious to most people. There are only so many OEM's out there. What you hope to get from a quality retailer isn't parts they manufacture themselves, but rather parts they have tested to make sure they are not just in-spec, but have the best accoutrements (like springco springs and top quality fasteners etc) and have the most desirable tolerances. The difference between "in-spec" and tight/loose can make a world of difference.
Do you have any opion on dirty bird enhanced bcgs? They have a profile that they claim to be better anti rotation/tilt. Just wondering if you had any experience with them. Thanks for the videos.. very much appreciated
Its question time. I've been into (ownership) of the AR platform for little over two years now. I'm not a gunsmith, I don't have a machine shop, but I am mechanical in nature with a mechanical background and a long term gun owner/hunter, (I'm 66yrs old, & a bit OCD but with a limited budget) Bla...bla..... I visit a local shooting range (I also reload ALL my center fire ammo and have sense the early 80's) sometimes I'm shooting, most times I'm picking up fired brass left behind by the shooters. So, in recent times the brass I pick up is no more than one day old fired, lots of AR owners frequent this range, 5.56(223) & 9mm is the most common brass I find. I have two questions regarding some of the 5.56/223 brass I find. 1st- some of it is smoked/sooted badly allover the casehead (not the case mouth), they look really bad, but other fired brass from other guns loos pretty new except for a light soot at the case mouth. Question, what's the most likely cause of heavily smoked/sooted cartridges in around the base? (I feel certain its in regards to the BCG) 2nd- On occasion, I'm finding spent cases from the same gun with EXTREME dent near midway of the case bodies. Now when I say dent, I mean severe, like the size of say a standard pencil eraser and indented halfway into the case diameter (LARGE IMPACTS) when I found these I would say that the ejection angle from the gun would have been way forward at about 1:30 to 2:00 (I'm this is over pressure, but I don't totally understand the extreme indent)? My aim is to increase my knowledge of spotting certain common issues and how to address them. Thanks For All Your Videos!
I'm watching all of this, trying to figure out how I could build a machine that could automate (some) of these tests, so that manufacturers could run every single BCG through testing and then certify the results on a printout afterward. To keep from having to replace gauges after repeated use, calibrated lasers could be used for most of the measurements. It's possible. And because it would be using lasers, the machine could be a worktop device about the footprint of a small microwave. The way these types of gauges would be used would be to calibrate the machine. The only problem with lasers is they might not read properly with highly reflective surfaces and coatings, so it probably wouldn't work properly with any of your gold (like titanium nitride) or chromed BCG components.
The other issue is that, frankly, manufacturers don't need or want to do so. As long as it's within the milspec for military contracts, and within "Good enough" spec for commercial sale, most don't care. Most likely the manufacturers also do many of these tests as part of QC, but they just don't hold to very tight tolerances.
you may have said this in a prior video, all these gauges you use were they custom made or available? They are very specific, yet I've never seen any of them on the market.
I have watched a few of these. I have been running toolcraft bcgs in my two Ar15s for years. I know there qc has gone by the way side. What affordable bcgs do you recommend? Bcm or aero pro bcgs. Thanks
I love my sons gun. Reblllious stripes m89. I recently got a fleur de liis solgw bcg with ocks for my 12.5 I’m peicing together. Alot of people don’t like that the sons barrel’s aren’t hammer forged chrome lined but most those people won’t shoot enough to wear a barrel out anyway. If they do solgw replaces parts including wear lol. What other company does that
So would you say that solgw milspec bolts are the best or one of them? Otherwise, what would you pick to be the best and most consistent even if not the typical milspec design?
Please correct me if I’m wrong, but SOL function tests each bcg, but they don’t do the HPT/MPI. Whoever’s manufacturing their bcg’s does. Also, can you confirm microbest is the oem for Sol bcc’s?
You can literally e mail these companies and ask who they use for BCG. SOLGW and BCM both use microbest and imo have some of the better BCG’s on the market. ADM is the only company I e mailed that flat out refused to tell me who they use for BCG’s. I let them know the previous 8-9 manufactures I contacted all let me know who they use as an oem. I also let them know that since they weren’t willing to share I wasn’t spending $1,300 on a new AR from them
Off the rip let me say I love ur vids and what ur about and forgive my laziness but have u ever gone over a POF bolt? I no that its short stroke/op rod an not di but I seen one the other day an it looked quite different than most in its class. Again thank u for all ur hard work and cant wait til ur next vid/learning lesson. God bless 🇺🇸🇺🇸❤️🇺🇸🇺🇸
When extraction happens but the bolt holds on to the case and doesn’t eject what is that usually caused by ? Iv got a relatively new upper / bcg that worked ok when new except it had a hard time extracting steel case ammo sometimes so I put in a BCM extractor spring kit. Seemed to work well for a while. Now it has been holding onto cases failing to eject causing major malfunction. Trying to figure it out
Great stuff!! Test tools are great to have. Magnet? I must have missed that explanation for the reason this is important. 👀 I’m familiar with particle inspection. But that’s not what was shown
Ever notice all the little brass shavings in your receiver? If you shoot steel case ammo the shavings will be steel, if anything is magnetic those steel particles will stick and can cause problems.
@@bigracer3867 The magnetic particle inspection (MPI) process. They're supposed to demagnetize it after however sometimes they can still retain a small magnetic field.
Not just mag drag, insufficient bcg clearance can make it impossible to seat loaded mags. I saw a guy running a bcm upper that couldnt seat full pmags. I believe it was a bcm lower as well but didnt ask.
I always have 2 or 3 Sons of Liberty Gun Works BCGs on hand for future builds. I also use other components of theirs as the quality is consistent. I own 2 of their rifles and am pleased with the workmanship and the skill of their builders. Another company that I'm starting to admire for their premium components is Forward Control Designs. I have found as I get older that quality comes with a price and you get what you pay for.
@@SchooloftheAmericanRifle Could you send some to europe with an added shipping charge? It just stinks if there is no chance to any outside US shipping.
Pressure test mag/particle test is great, at the time of the test. Doesn’t mean that it won’t fail 1-5,000 rounds later. Seen that once. Got 6 shots off and the DD bolt cracked at lug… of course they swapped out a new BCG. Just alway wondered about the actual data of individual vs batch testing and their longevity after the fact
If it was a 5.56 DD rifle then it was a Microbest BCG. Same exact one as in this video. Your rifle actually got 11 shots off. Its test fired with 5 rounds at the factory. You can do all of the testing in the world and something can still fail. Doesn't mean its a bad product. Anomalies in material and processes happen. We try our best to minimize them though QC and testing, but things still happen. The main thing is that its fixed in a timely manner.
Hi! ☺️ I run the camera. I apologize for the racket. The fixture we use to hold the camera was having issues. We were unaware that it was being picked up. We have since ordered a new one.
SOTR literally owns YT for this corner of the educational market. Nowhere have I seen so much thorough and complete testing parameters. Science level and really appreciate it!!
YT?
@@107gammathe app you are watching on. YT. RUclips.
@@107gamma RUclips?
I second your opinion on SOTAR. So much so that I just subscribed after realizing I wasn't already subscribed.
Agreed. I like that he talks fast works fast and clearly explains everything with no wasted jibber jabber.
It is absolutely unreal how much I've learned from a half dozen of your videos so far .Thanks man! 🤘
Learn something new every video! Never encountered "mag drag"...something new to check/troubleshoot 😁
I've watched a bunch of your BCG physicals. And i'll keep watching them as long as you keep posting them. Dirty hands are working hands. Working hands built and keep out country going.
Two videos? We're not worthy! Thanks again for the knowledge, Chad!
as always, im blown away by the level of knowledge and attention to detail. thank you.
I am in the process of building my first ar and this video has been extremely helpful and educational. Thanks for making this video
I run 2 SOLGW guns very well built weapons and a good company to buy from great video very educational.
I'm glad you showed the go no go between the mag, lower and upper of a firearm
LOVE the speed run of the BCG Physical. Keep this up 🤘
When I grow up I want to be like this Hombre, I am only 62 years old now 😊
Every time you do an inspection you get faster and more efficient it seems. Thanks for doing these. It’s taught me a lot.
I love their bcg’s simple no frills old school quality
Hearing these are individually MPI tested and fired is new to me and reassuring. I would shortlist these just for that.
Also one of the few bolts that are HPT tested
Can you explain what HPT is and why it’s important? Also does it mean this has been done just because the bolt face has brass on it and it’s marked HPT?
@@highoctanehotrod
HPT means it’s “high pressure tested”, which means it’s been fired with a 70k psi proof round. After that it should get MPI’d (magnetic particle inspected) which checks for any cracks or stress fractures.
Having brass on the bolt face could mean that it’s been HPT/MPI.
It could also mean that it’s only had some standard ammo put through it for basic function testing without having been HPT/MPI.
That is... standard. This is a bog standard bcg. I never understood why people laud SOLGW. They don't even make the bcg's, they're literally just MicroBest that they test fire with the three rounds on full auto. Big deal
@@lioncelica5170
🤣
It's nice to see quality work.
Thanks for the education and kudos to the person behind the camera.
That's my lovely wife doing the camera work. Thank you.
Thank you! 😊
Keep the videos coming.....very informative and interesting, learn something new with every video, Thanks Chad.
I have a SOLGW BCG and have faith in it. One time I had a guy next to me at the range where his new 18" rifle build could fire a round but not chamber a new one no matter how many times he tried. He was using a standard Aero BCG. Had him try my SOLGW BCG and it ran and ran. Educated him on the importance of quality BCGs.
Probably a loose gas key. Aero BCG's are in the same ballpark price wise as SOLGW. Money isn't the issue, its the OEM who'd dropping the freakin ball.
And then everyone clapped
Aero sucks and is a joke imo! Purchased a brand new AR-10 bcg from them that did the same thing! Replaced bolt with a cryptic coatings bolt and it’s off to the races!
@michaelfoxx6881
Cryptic coatings is Shite...coatings are the least imp thing when it comes to bcgs
@@michaelfoxx6881lol ! Aero isn’t junk by any means
Love the knowledge you share brother! I am always hypnotized by your videos. Thank you for sharing your love for the platform
Ordered one of these purely based on your review- but also on how quality this thing looks. Bravo sir!!
Thanks again for the education. These are the best gun videos , bar-none!
I learn so much from these videos..
Always had good luck with these and the Sionics
Watching this content was a pleasure as always
Awesome as always, learned something new! Thank y’all!
Outstanding as always!
👍👍👍👍👍!
I know zero about BCCG details and function, but now I want to learn more! Thanks for the schooling
Thank you for sharing this thorough inspection/testing process 😎
Don't ever apologize for dirty hands. People who are bothered can screw off.
Thank you sir. I was interested in this BCG and you help me make my decision. I figure it was a good product but seeing it tested proves it.
Any information is good information. Good video
Another great video! Thanks to both of you!
Outstanding. Great attention to detail.
Glad I bought one of these on sale for my general purpose 13.9 build!
Awesome informative video, thank You.
Another excellent video, thank you
Thanks for sharing , your a wealth of knowledge 👍
Yeah , you do so much for us brother. Thanks again and yes solgw is my standard and go 2 on my rifles I depend on
Thank you my friend
Excellent work Sir.
"Six - 69, noice" Thats an easy spec to remember
This is an incredible video
Excellent video 👍
I wish I had all those gauges! LOL! And I'm officially AR dumb now but not as dumb before I started watching these videos!
That Gauge pin GO , NO GO, set up is very handy. May I ask where you obtained all of those? Thanks!
Great job with your presentation. I use a lot of the same tools in my work as well and have an appreciation to see them used in something that interests me. New subscription from me .
Micro best bcgs are very good. Expo arms, Daniel Defense, BCM, sons of liberty and a few others use them
Is there proof of this or just another rumor? I just buy Micro Best .
@@SuperUncleRyanyea it’s well documented and if your second guessing it most companies will tell you if you e mail and ask.
You can tell a Microbest BCG by the very obvious chrome splash on the face of the carrier. All of the above mentioned carriers have that identifying chrome splash.@@SuperUncleRyan
@@SuperUncleRyan it's pretty well documented.
That's one of the realities of the market that is obscured or just not obvious to most people. There are only so many OEM's out there.
What you hope to get from a quality retailer isn't parts they manufacture themselves, but rather parts they have tested to make sure they are not just in-spec, but have the best accoutrements (like springco springs and top quality fasteners etc) and have the most desirable tolerances. The difference between "in-spec" and tight/loose can make a world of difference.
I would be interested in your review of the "Surefire Enhanced Bolt Carrier Group".
Me too! All you have to do is buy one and send it to him 😉
Love the videos man this is the reason why I bought the SLOGW BCG from the earlier video that you did on these
Can you test BCM, and Toolcraft? AO, Microbest, and many others would make great cotent.
. Thank you Sir, love your vids.
Do you have any opion on dirty bird enhanced bcgs? They have a profile that they claim to be better anti rotation/tilt. Just wondering if you had any experience with them. Thanks for the videos.. very much appreciated
What is the clamp you use on the bolt to depress the ejector so you can remove the pin and check the tension spring?
Two videos today. Thats great.
Its question time. I've been into (ownership) of the AR platform for little over two years now. I'm not a gunsmith, I don't have a machine shop, but I am mechanical in nature with a mechanical background and a long term gun owner/hunter, (I'm 66yrs old, & a bit OCD but with a limited budget) Bla...bla.....
I visit a local shooting range (I also reload ALL my center fire ammo and have sense the early 80's) sometimes I'm shooting, most times I'm picking up fired brass left behind by the shooters.
So, in recent times the brass I pick up is no more than one day old fired, lots of AR owners frequent this range, 5.56(223) & 9mm is the most common brass I find. I have two questions regarding some of the 5.56/223 brass I find.
1st- some of it is smoked/sooted badly allover the casehead (not the case mouth), they look really bad, but other fired brass from other guns loos pretty new except for a light soot at the case mouth. Question, what's the most likely cause of heavily smoked/sooted cartridges in around the base? (I feel certain its in regards to the BCG)
2nd- On occasion, I'm finding spent cases from the same gun with EXTREME dent near midway of the case bodies. Now when I say dent, I mean severe, like the size of say a standard pencil eraser and indented halfway into the case diameter (LARGE IMPACTS) when I found these I would say that the ejection angle from the gun would have been way forward at about 1:30 to 2:00 (I'm this is over pressure, but I don't totally understand the extreme indent)?
My aim is to increase my knowledge of spotting certain common issues and how to address them.
Thanks For All Your Videos!
I'm watching all of this, trying to figure out how I could build a machine that could automate (some) of these tests, so that manufacturers could run every single BCG through testing and then certify the results on a printout afterward. To keep from having to replace gauges after repeated use, calibrated lasers could be used for most of the measurements. It's possible. And because it would be using lasers, the machine could be a worktop device about the footprint of a small microwave. The way these types of gauges would be used would be to calibrate the machine. The only problem with lasers is they might not read properly with highly reflective surfaces and coatings, so it probably wouldn't work properly with any of your gold (like titanium nitride) or chromed BCG components.
The other issue is that, frankly, manufacturers don't need or want to do so. As long as it's within the milspec for military contracts, and within "Good enough" spec for commercial sale, most don't care. Most likely the manufacturers also do many of these tests as part of QC, but they just don't hold to very tight tolerances.
BCM already uses the process you just described.
I Learn something new everytime.
10:58 I heard of lancer mags having an issue when used as a bipod on forums...
looks identical to my PSA FOF microbest....
Great info!!
you may have said this in a prior video, all these gauges you use were they custom made or available? They are very specific, yet I've never seen any of them on the market.
PA has these on sale for $123 right meow,great price for a great BCG.
I have watched a few of these. I have been running toolcraft bcgs in my two Ar15s for years. I know there qc has gone by the way side. What affordable bcgs do you recommend? Bcm or aero pro bcgs. Thanks
I love my sons gun. Reblllious stripes m89. I recently got a fleur de liis solgw bcg with ocks for my 12.5 I’m peicing together. Alot of people don’t like that the sons barrel’s aren’t hammer forged chrome lined but most those people won’t shoot enough to wear a barrel out anyway. If they do solgw replaces parts including wear lol. What other company does that
Just threw one of these in a new build I’m doing. Haven’t run it yet though.
Did you get the tools as a kit or individual? The go no go gauges.
So would you say that solgw milspec bolts are the best or one of them? Otherwise, what would you pick to be the best and most consistent even if not the typical milspec design?
Have a chance to look at one of their chrome lined BCG? Have an opinion on a Chrome lined one over the phosphate?
I’m surprised you haven’t done one of their chrome ones. I have one if you need a loaner.
What Centurion Arms Sand Cutter video are you referring to? I can't seem to find it.
Uploaded it right after this video.
Chad, do you replace the carrier key automatically when you buy a new BCG ?
That’s how it’s done, respect
I noticed my firing pin is magnetic. So what does this mean and why ? Should I replace BCG
Well done, as always Chad!
Please correct me if I’m wrong, but SOL function tests each bcg, but they don’t do the HPT/MPI. Whoever’s manufacturing their bcg’s does. Also, can you confirm microbest is the oem for Sol bcc’s?
Yes. Microbest makes sons bolts. Sionics, bcm and a couple others too I think. But I know these three are for sure.
Also expo arms and daniel defense if my memori serves me right
You can literally e mail these companies and ask who they use for BCG. SOLGW and BCM both use microbest and imo have some of the better BCG’s on the market.
ADM is the only company I e mailed that flat out refused to tell me who they use for BCG’s. I let them know the previous 8-9 manufactures I contacted all let me know who they use as an oem. I also let them know that since they weren’t willing to share I wasn’t spending $1,300 on a new AR from them
@@ramzankadyrov6035they don’t make just the bolts, they make the entire BCG
@@jstud999 im assuming that is what he meant
I want to send my upper to this guy sooooo bad
Off the rip let me say I love ur vids and what ur about and forgive my laziness but have u ever gone over a POF bolt? I no that its short stroke/op rod an not di but I seen one the other day an it looked quite different than most in its class. Again thank u for all ur hard work and cant wait til ur next vid/learning lesson. God bless 🇺🇸🇺🇸❤️🇺🇸🇺🇸
When extraction happens but the bolt holds on to the case and doesn’t eject what is that usually caused by ? Iv got a relatively new upper / bcg that worked ok when new except it had a hard time extracting steel case ammo sometimes so I put in a BCM extractor spring kit. Seemed to work well for a while. Now it has been holding onto cases failing to eject causing major malfunction. Trying to figure it out
Generally the ejector spring can not overcome the tension of the extractor spring. Or the ejector is getting hung up in its hole.
What sizes are those pin gauges???
SOLGW is *THE TRUTH*
so what BCG would you recommend based on all the tests you have done?
Microbest phosphate +
Can you get ahold to a KAK Industry K-spec for a physical?
Been waiting for this. I jumped to buying 3 of theirs on sale out of trust and word of mouth.
Great stuff!! Test tools are great to have. Magnet? I must have missed that explanation for the reason this is important. 👀 I’m familiar with particle inspection. But that’s not what was shown
Ever notice all the little brass shavings in your receiver? If you shoot steel case ammo the shavings will be steel, if anything is magnetic those steel particles will stick and can cause problems.
He uses a simple steel washer to test if the components are magnetic. If they are, shavings from steel case ammo can gum up the works.
@@Mr_Clean how would it get magnified? From bolt reciprocating?
@@bigracer3867 The magnetic particle inspection (MPI) process. They're supposed to demagnetize it after however sometimes they can still retain a small magnetic field.
Does anyone know where to get the actual dimensions for the bolt and bolt carrier group?
Where can I get a gauge set like yours?
Here for it👏
Not just mag drag, insufficient bcg clearance can make it impossible to seat loaded mags. I saw a guy running a bcm upper that couldnt seat full pmags. I believe it was a bcm lower as well but didnt ask.
People get what they pay for. Its not just a roll mark.
The inside of that BCG looks like finger prints there at the beginning.
Do the KMTactical $50 bcg. Looks great
I always have 2 or 3 Sons of Liberty Gun Works BCGs on hand for future builds. I also use other components of theirs as the quality is consistent. I own 2 of their rifles and am pleased with the workmanship and the skill of their builders. Another company that I'm starting to admire for their premium components is Forward Control Designs. I have found as I get older that quality comes with a price and you get what you pay for.
What the duck
i wouldve expected Optimised Carrier Key Screws to be standard on SOLGW. I understand how they test fire, but its litterally a $4 dollar upgrade.
Great review
Between working on cars, and guns, my hands always look dirty, but they are clean lol.
Solid BCG!
I need a SOTAR patch! When will they be in stock?
We had them for sale a few weeks ago. Unfortunately they all sold out in a few days. We'll get more as soon as we can.
@@SchooloftheAmericanRifle
Could you send some to europe with an added shipping charge?
It just stinks if there is no chance to any outside US shipping.
@@onpsxmembertry living in the southern hemisphere and get stuff from the states!
10:40 I don't see a video for the centurion sandcutter
It's uploading now. It will take a while to complete.
@@SchooloftheAmericanRifleAwesome. I've been looking forward to see how they gauge out.
Pressure test mag/particle test is great, at the time of the test. Doesn’t mean that it won’t fail 1-5,000 rounds later. Seen that once. Got 6 shots off and the DD bolt cracked at lug… of course they swapped out a new BCG. Just alway wondered about the actual data of individual vs batch testing and their longevity after the fact
They obviously dropped the ball big time on the MPI. Had they done a proper one, you wouldn’t have received a bolt that cracked in 6 rounds.
@@jstud999or DD batch tests and that one slipped through the cracks. Not sure if they do I just couldn’t see them not catching that if it was tested.
Never claimed it wouldn't fail, with the proper testing it's less likely to fail early.
If it was a 5.56 DD rifle then it was a Microbest BCG. Same exact one as in this video. Your rifle actually got 11 shots off. Its test fired with 5 rounds at the factory.
You can do all of the testing in the world and something can still fail. Doesn't mean its a bad product. Anomalies in material and processes happen. We try our best to minimize them though QC and testing, but things still happen. The main thing is that its fixed in a timely manner.
Why's the camera man so noisy?
Hi! ☺️ I run the camera. I apologize for the racket. The fixture we use to hold the camera was having issues. We were unaware that it was being picked up. We have since ordered a new one.
@onna-day7047 that's cool thx for replying, love your videos. Keep it up
Comforting to see. I own a pair of these. I’m not a heavy user so tolerance issues could remain hidden from me.