Seriously dude!! Great stuff.

Agreed 100%. Especially considering they adhere to TDP spec and non-proprietary parts. During a livestream of their new products a few years back, I jokingly asked Bill about the wood table he had everything displayed on. It triggered his extreme attention to detail OCD, and he starting rambling about the type of wood, how it was made, blah blah blah. The point is, he knows details, and that is what makes their products so successful. I have only run LMT E-bcgs for a while, but I had one of these civilian Sandcutter carriers, and was not impressed with the QC. I'll be switching everything to the G REBCG's now, especially considering their price and availability.

Sometimes you are just paying for the name

@@jaredbickmore2474 Sample size of one.

​@@onpsxmemberif it was me and I was paying $500+ for a BCG/$2,000 for an upper receiver, $4,000 for a complete rifle, they can stick their sample sizes up their ass. It better be right. If it's not, what the hell are you paying for ?

I don't believe the rifle was kac just the bolt carrier.

there are always going to be mistakes made, but it is interesting to see a KAC bolt carrier messed up like that i agree. I'd still trust a carrier from KAC but this is something to keep an eye out for now that we see at least one instance of this happening.

It's not as big of a deal if it's not the most efficient, especially because a crazy large number of AR's on the market are grossly overgassed so it actually kinda helps. But for a well gassed AR I think I remember him doing a couple new BCM's that passed with flying colors, one of which was his own. There are others but aren't coming to mind. Also as you use them they will obviously wear and those tolerances will get bigger as time goes on, but as long as your gas key is done right and there's no real leaks it should run fine if there's no other real problems

Forward control designs BCG have always done amazingly as well. Watched this entire catalog of bolt carrier group testing and FCD has had extremely tight tolerances. Building my first AR-15 and still deciding between LMT enhanced bcg and Scionics/FCD.

the e3 bolt will only work in the sr15 uppers, which have different chambers cut for the knurled lugs on the e3 bolt face. this is not an e3 bolt and bcg, but a normal one meant for non-sr15 uppers.

Was this your BCG?

@@floridaredfishin8209 No. I had one just like this and had to send it back. The gas key came loose.

People should keep in mind that most individual firearm parts are inspected on the AQL system. Brands that commands a higher price will inspect a higher percentage of parts, but most parts will still be sent through without inspection if the batch passes QC so some bad parts can slip through.

if you actually look at kac parts with an educated perspective this isn't surprising at all.

@@JTTTTT850 can you elaborate

You should be more open minded. Price doesn't mean everything.

You just made my day! Thank you!

@@onna-day7047 your welcome. Keep up the good work. 👍🏻

I do this in classes with oil. I also have a jig that measures gas loss.

I would get all three: go, no-go, and field. The go needs to fit in, if it doesn't stop using that rifle NOW. If the Field fits, stop using that rifle, NOW. No-go is the maximum as-new size, it safe to shoot even if the no-go chambers. Each one tells you something different. If you only have the no-go, you won't know if the chamber is too tight or too loose. Not to mention that I don't think you can buy them individually.

@ABlindMan1 would be my guess, too.

If parts are magnetic and you shoot steel cased ammo, it possible that casing and projectile shavings can stick to operating surfaces. This can cause reliability issues.

Quality Guru he said that the guy who he got the bcg from contacted him on the SOTAR Facebook group. Hope that helps! Good luck!

@@jefflemaster2850 Thanks for the intel.

When they work and are in spec they’re great..

@@MyLonewolf25 that doesn't sound like a ringing endorsement.

Also, my KAC bolt has a beefier extractor with dual springs. Don’t know if it is a KAC carrier with another branded bolt?

I think this Bolt is from BCM and not from KAC.

You are correct!

There was a group created to help answer all the questions. facebook.com/groups/sotar/?ref=share

Field gauge is the final step before being unsafe. This is because if something fails the field gauge it is unsafe to use in any case, even in life or death situations such as in the "field". But if it passes a field gauge while failing a no-go then the item can be used but it will not be optimal. no-go is more for the purpose of ensuring a quality product while field gauge tests the safety of a product.

I think he mentioned that the carrier is sometimes sold separately, because it may be going in a different rifle.

I own one of these and that definitely isn’t the E3 bolt from Knights!!!!

Or maybe they appreciate the "heads up" on their QA/QC process. Any mfr that cares about quality would appreciate learning about something that slipped through the cracks.

Yes. I stated such in the video.

Marvin Pitts thanks captain obvious

Reggie Kanan and? It was clearly stated in the video. KAC sand cutters are sold as a bolt carrier without bolt, allowing you to use the bolt of choice in non KAC barrels due to barrel extension and bolt being proprietary to knights.