Ep-7: How Does the AR-15 Bolt Carrier Group Work? Which One Do You Need?

[@At3tactical]

*AT3 Tactical Available @ Amazon* amzn.to/46ot4am *New Monthly Giveaways & AT3 Tactical Videos* (No Firearms Sales) content.at3tactical.com/

[@tacticalmayo879]

Cycle of operation per the USMC Firing, unlocking, extracting, ejecting, cocking, feeding, chambering and locking SIRRRRRR!!!!!!!

[@At3tactical]

YESSIRR!!

[@frankgrillo8094]

I went with Lantac E BCGs & Silent capture buffers-- AWESOME smoothness & reliability !

[@CarlPapa88]

@4:24 Just getting parts together & learning. Didn't know the gas CH kept the gas tube in line during functioning. 👍

[@Thtguymoe]

I just found this channel and as I started this video I was putting some things away and I recognized this voice. I said to myself, “That sounds like Randy from BRS.” Low and behold, it’s Randy! Awesome how the interests cross over. Glad to see you over here Randy!

[@At3tactical]

Haha! How about that?? Good to see you here too. Thanks Kevin!

[@daviddroescher]

6:12 cotter pin is the most likely part to get lost... This is why disassembly of the BCG was forbidden during deployment for my Unit. Of corse I was told that i missed the memo when a supervisor walked in wiith my parts separated into 2 piles , 1 to be cleaned 2 cleaned ready for assembly.

[@mrshort2379]

ALL I want out of my AR-15 and the BCG is to build it to be combat ready in other words to be able to run at any given time for any reason

[@hairydogstail]

Then take it to a competent AR gunsmith or armorer and have them check it out..They will check it out with a function gauge, throat gauge, head space gauges, firing pin protrusion gauge, extractor gauge, boat tail gauge and many other critical areas with pin gauges..

[@rudolphferdinand3634]

Then what you are wanting is an LM&T-BCG, but they are costly at $500. Research Lewis Machine & Tool Bolt Carrier Group to see why so much money.

[@Blanderr]

​@rudolphferdinand3634 you don't need to spend even close to 500 to get a good, solid bcg. There are plenty of options from brand like DD, SOLGW, BCM, FN or Gesselie

[@wintersoldier4335]

Spare me the average Soldier or contractor carrying the same things that every Soldier for a DOD contract is by far not much different than a decently priced PSA or something comparable go look at Small Arms Solutions I'm not telling you about Ultra cheap but your go look at Small Arms Solutions I'm not telling you about Ultra cheap but your main components of the barrel the boat Carrier Group you're buffering your buffer spring Miranda same thing my Chrome Molly Vanadium chrome-lined barrel with a 1 and 7 twist is what we had overseas if you're looking for anything more than that that's fine spend your money do whatever you want but if you want to be combat ready that's all you're going to need you're not going to be doing endless strings of fire that are going to melt the barrel unless you're an idiot

[@LU-D1GITAL]

@@Blanderrrubber city armory makes some awesome bcgs

[@Jupiterxice]

As Army Vet you broke this down even better Armor could. I still want to get into this hobby building rifles and fixing them. Kudos

[@At3tactical]

Thanks for the feedback. Glad we could help.

[@anthonyyoungen4709]

Agreed

[@michaelw.urbansr.8617]

Hwy there i am shopping for a BCG for a new build of a 18in ,Mid-Length 6mmARC rifle. One company has two choices of BCGs that vent down or, to the side(right). What is the diff?? And which is a standard BCG i need for my standar 6mmARC build? thanks and good stuff!!!

[@At3tactical]

The vent down option is mostly to reduce gas in your face if you are running suppressed. If you are not running a suppressor then just get the vent to the side option.

[@CSGATI]

Mine is boron nitride a fully automatic machine gun part will I be arrested?

[@bradskeyt5444]

Most bcgs are fully auto, that doesn't mean your gun will be fully auto. You will not be arrested unless you have the actual piece that makes your gun fully auto.

[@samuell4452]

Another awesome and informative AT3 video. Thank you guys!

[@E85_STI]

So I shot some ones AR and I never felt a light trigger like that before but I do know that the heavier trigger is for close combat to prevent ND but when I pulled the trigger like I always do it fired two rounds so dang fast and it felt nice but I’m wondering why it would shoot that fast. I was trying to release the trigger until I heard the click because I was zeroing my new rifle.

[@michaelw.urbansr.8617]

I plan to use a new 6mmARC build for some medium range competition shooting. What kind of BCG should i get? If the enhanced one thatr are cut to reduce weight are only for weight reduction ,then i dont need one of those as i can handle the rifle just fine. But im looking for something that will be 100% reliable if there is such a thing and accuracy ,as much as i can get? Thanks and great stuff

[@eliinthewolverinestate6729]

The extractor o ring can give people trouble in cold weather. It's small over looked part. But it can make all the difference with bolt going into battery. Which leads most to think its a problem with spring or weight and not with the extractor.

[@hairydogstail]

Nickel boron is a terrible coating, mil spec is hard to beat and can hold oil better than most of the newer finishes..Chrome plated carriers are excellent if done correctly..It is more important if the bolt and carrier is machined correctly with the proper 3 bore dimensions and length..

[@user-un5my5bw4j]

Newer pvd and cvd coated bcg's have self lubricating properties, are harder, and smoother and are 10x easier to clean. They do not need oil. Oiling a bcg gives prone to failure in dusty and sandy conditions. Mil spec parkerized are not near as good as newer coated bcg's and are a lot harder to maintain. With whats available today no one should opt for mil spec parkarized

[@hairydogstail]

@@user-un5my5bw4j You are wrong about not using oil or a good gun lube on your AR BCG. The best lube I have found is the old LSA, but even home brews will work fine.. In fact you really can't over lube them, as any excess will just blow out the piston exhaust port.. AR rifles run the best when lubed properly. Many AR owners under lube their rifles for some reason. ..A properly built AR will run and run as long as it is kept well lubed, even with extreme carbon fouling..Just keep adding lube as it gets burned off and it will keep running..The caveat is to use the proper lube for the outside temperature..You are paying a lot of money for little gain with any of the new wiz bang coatings... Manganese phosphate will hold oil better than others and there is no better choice. Hard chrome plated BCG's can be good if done correctly.. What is (vastly) more important is a correctly machined carrier 3 bore, gas key I.D. length and over all tolerances..Unless you know the specs/tolerances and have the correct pin gauges to test your carrier, then you are better to use BCG's with proven tract records such as BCM, Colt, Sionics or SOLGW all with phosphate coating.. Why people think cleaning a manganese phosphate BCG is some how a hardship is beyond me lol.. Nickel boron is one of the worst coatings with a terrible tract record as far as coatings go..

[@garyjohnson7314]

Great information. I encourage everyone to watch this build series

[@At3tactical]

Thanks! We appreciate that.

[@bjolly8924]

This really makes me appreciate my a AK. Much much simpler, and just as effective.

[@Christoph1888]

Does it drive the bolt forward or push the bolt carrier group rearward. I thought it did both but seeing as the bolt was up against a chamber and casing the effect was to push the carrier rearward while unloading the lugs

[@ratsrodsgarage461]

Nice video series and thank you for not being Hollywood on youtube.

[@At3tactical]

Thanks for checking them out!

[@SecretAgentLamarScrotus]

Thought this was a lightsaber comparison test at first

[@At3tactical]

🤣 You just opened my eyes! 100% see that now! 🤣

[@icecoldrugby]

Gollum voice, "dirty gas guns with their filthy ventses. Disgusting filthy BCGS."

[@At3tactical]

😂😂😂

[@USMCSDI]

Great Video. Getting ready to buy some Nickel Boron BCG's for my older AR's and this video was a huge help in that! Keep doin what ya do Patriot

[@At3tactical]

Big thanks from me, Brother! Glad to help out. -Randy

[@hannibalbarca2939]

Would highly advise against nickel boron, brother.

[@USMCSDI]

@@hannibalbarca2939 why’s that?

[@hannibalbarca2939]

@@USMCSDI brother, google "School of American Rifle bolt carrier coating" or Small Arms Solutions and his video on best coatings. The consensus is that phosphate, np3, and chrome are the best. They usually rate nitride next, and towards last is nickel boron due to many many recorded issues. What's your budget? I can give recommendations based upon research I've done, if you want. If not, run what you wish. But microbest chrome carriers are available for like $115 right now.

[@CharlesLaBuhn]

For a youngster you are very knowledgeable and you speak well also. Kudo's to your parents. Well done.

[@At3tactical]

Very flattering for being in my 40's! Thanks! :)

[@mikechurchill1071]

Is number 8 missing? Looks like it goes right to 9??

[@At3tactical]

Yeah, that one got us a couple slaps on the wrist from KZbin. But not to worry; those missing episodes and other to-hot-for-tube videos are up at our AT3 Knowledge Center! content.at3tactical.com/

[@edkeck3919]

As always, very informative 👍👍

[@1400IntruderVS]

The heart of your firearm

[@At3tactical]

100%!

[@t.lledsmar6052]

Directions unclear. BCG stuck in protein skimmer

[@dirtybrd702]

Can you do a review video on the BCG's and Barrels by Spikes Tactical

[@At3tactical]

Good Suggestion.

[@christopherturner5575]

what happened to ep 8 on lowers?

[@At3tactical]

Yeah... That one got us in YT jail. Twice. Ha! You can find it at the AT3 Knowledge Center, though. Just scroll a bit to the full playlist, it's in there. content.at3tactical.com/

[@matthewmorian5178]

@@At3tactical It's not on the website either. Is there a direct link you can post?

[@jrossnjax7]

Brass in barrel was prob from test fire

[@At3tactical]

Check out ALL our Videos, Blogs and.... the occasional Giveaway! content.at3tactical.com/

[@stephenguzman1870]

The link in top right at the end is to "Testing PSA Micro Dagger Compensators" instead of Lower Receiver Overview.

[@At3tactical]

Thanks for catching this.

[@IgorNascimento-l8r]

Qual loja envia Bolt para Brazil?

[@At3tactical]

Não sei. Enviamos apenas para os EUA

[@gennaro13]

Look at the camera

[@lobbyrobby]

I went from not knowing what BCG meant to almost an expert how how it functions in 1 KZbin video. Thank you guys!

[@bjolly8924]

No doubt, this guy is totally underrated. What a great instructor.

[@JeromeBrownell]

Great info. Thank you

[@blitzv10]

Is this the same guy from the salt water fish tank videos

[@At3tactical]

Darn tootin'!!! Man, I'm floored by how many "reefers" and shooting crossovers there are. Obviously I was in good company in that last hobby. Thanks for coming along, Man! -Randy

[@s13ef9]

I knew he seemed familiar!

[@TheSmitty79]

Hay Randy glad to see your doing videos again. Lol youve just move to my most expensive hobby. As as always great job.

[@At3tactical]

Thanks! Glad to see another crossover hobbyist... we are stronger than I thought!

[@Patrickmetaldetecting]

Great video

[@DonnaSeward-m7l]

I need the NIB one...can i have it?

[@user-un5my5bw4j]

I prefer Cryptek Mystic Black CVD coated bcg's because they are much easier to clean, nothing sticks to them, nothing is more wear resistant and nothing is slicker. I also like there precise machining tolerances they keep as close as we do in the benchrest world. 2nd choice is Iron City Rifle Works Black Diamond bcg

[@raymondj8768]

This was a Great video it Really breaks the how BCG down so you understand everything about it Thank You !!!!!!

[@At3tactical]

Glad to hear it!

[@chrismartinez970]

Can any bolt Carrier and charging handle fit on my 5 inch ar15 ?

[@At3tactical]

If it's labeled or marketed for your standard AR15/5.56/.223, then 95% or more of the time it will fit universally. (Especially the BCG.) For example, I use the same BCG/Handle for my (12.5") 5.56 Upper that I use when I swap out the upper for my (8.3") .300bo upper.

[@hairydogstail]

@@At3tactical Always check head space when using a different bolt..This is not debatable....

[@ThuzzelBLS]

Thanks

[@PeterRoos]

Great video series, thanks.

[@At3tactical]

Thanks for watching.

[@AllMoneyIn]

Thank you for the great breakdown. This whole series has been amazing!

[@At3tactical]

Thanks! And thanks for following along!

[@EVH5150iii]

Thankyou

[@At3tactical]

You’re welcome 😊

[@ryanbb474]

Great intro with BCG process explanation

[@At3tactical]

Glad it helped!

[@nickseguine393]

Because the ar15 is chambered for 556/223 the barrel is milled accordingly. How accurate can a 9mm or 22lr round be just because the bolt is changed for that round? with all the tolerances being as they are its hard to fathom the round not jumping around going down the bigger bore barrel? Did I make any sense?

[@mikechurchill1071]

You get a different barrel when you change the bolt carrier group. The BCG caliber and the barrel caliber always match.

[@stefanl5183]

Ar 15's can be chambered in various different calibers. The different calibers use different barrels and the barrels are chambered according. For example, I have a .410 caliber AR15. It's barrel has a .410 bore and is chambered to .410 shotgun shells. Of course it's also necessary to use an appropriate BCG and my .410 AR15 uses a special BCG designed to work better with .410 shells. Anyway, that's what he's alluding to here when he talks about .22 and 9mm BCG.

[@Mostly_Peaceful_Protestor]

No. Not even a little. For one thing, you refer to the 5.56mm/.223 barrel as a "bigger bore barrel" than a. 22 or 9mm. It is bigger than neither. A .22 is the exact same diameter as .223/5.56mm, albeit with a much different chamber. And last time I checked, 9mm is bigger in diameter than 5.56mm and can't possibly fit in a 5.56mm barrel. As others have said, when you convert an AR to a different caliber, that conversion includes a new barrel chambered for a different round.

[@Sparkdawg1776]

Great videos! What happened to 8?

[@At3tactical]

SO glad you asked! That was our first slap on the wrist here on YT.... But, we do post ALL of our videos on the other big video platforms. Our Utreon is probably the best/easiest way to browse; and we will forever keep it FREE. :) utreon.com/c/at3tactical/videos

[@handle924]

@@At3tactical Thanks for the awesome series of videos. please stake this comment :)

[@At3tactical]

@@handle924 Done and did. Great call out!

[@EliB207]

2.4k th like

[@At3tactical]

Thanks