Explaining The Gas System On An AR15

Great content! Thank you!

Lower those eyebrows bro

This is very informative for a novice.. but it didn’t provide the information I was looking for.. it just stated the obvious to me .. I’m looking to find what advantages between them.. because on a 10.5 barrel (SBR) you can run pistol or carbine gas tubes..
And my gas block is listed in your list.. I have a .875 on my barrel..

Awesome. Loved this. Want to build my first AR from the ground up. This helped a ton!

Never heard you mention gas port hole size and how it might come into play.

Great information

Just fyi but a lot of this information isn’t true

Good video!

Thanks for the easy explanation simple

You said its ok to use a carbine length buffer tube on a rifle length gas system for AR10… Any potential cycling issues that this could cause?

👍👍👍👍👍👍👍👍👍👍👍👍

Boss give me idea. How to set my 7.5 barrel. Its jam always.. please help me

The video is in 4k but why the intro in 720p? lol

Started out as promising information… But ultimately all the stuff is intuitive and common sense. What I would like covered is overgassing and undergassing. Will a rifle length gas system have a tendency to over gas or under gas? Also my simulation skills are reaching its limit when it comes to the porthole size. Will a larger porthole increase gas pressure to the bolt or decrease?

I was looking at a 16-in barrel from Criterion that has a rifle-length gas system. It has a .750 port. Edit: this is barrel diameter, not port size.

I just want a soft shooting rifle that cycles reliably suppressed and unsuppressed. I just don't know what to pick.

Hey I know I'm late to the video, I was just talking to a guy in a gun store while I was looking for grips and stocks and things like that, I just got my first ar, and he said on my mil spec ar15 a2 clone from Delton that I can't put any longer than a 7 inch handguard over my existing gas block and gas tube setup. I was looking to do a 13 inch m Lok handguard but do you know if he's correct or where I could find more info? Or is there some sort of slim gas system I could put in that wouldn't interfere with the free float handguard? Thanks!

I can not believe you actually told these viewers that a rifle length spring and buffer can be used in a carbine buffer tube. Maybe you should try that set up an post a video of how well it works for you.

trying to make a ar15 chambered in 5.45×39 and wanting it in a pistol form while also having a bit longer barrel for a little more velocity which will be carbine rifle. I'm just confused on what gas is perfect and trying to understand the different effects on close, mid, and end barrel gas choices.

I'm only here to figure out how the hell my gas tube that is on top of the star chamber broke off from the receiver

What size gas tube would you recommend for a 16 in barrel?

This was a very informative video. So from what I'm gathering, for my ar10 308 pistol build starting with a 7.5" barrel I'd need a pistol length gas tube. Would I also still need a pistol length buffer spring and tube or would that be effected by the 308 caliber?
Also does that determine what direction I need to head in the gas block?

this answered all of my questions, thank you so much for this video.

Very comprehensive breakdown. Thanks

Very informative to a novice builder, thank you

Thanks a ton for the explaination!

So I currently have a Del-Ton ar15 with an 18” barrel. I still want to keep the 18” barrel size. Anyway, I fully built the lower and I purchased a G3 Competition Enhance BCG CopperHead bolt carrier (light weight skeleton BC). Now I obviously can’t use it yet until I upgrade the gas system/buffer tube, but I am still wanting to shoot 223/556 (as I can do that currently). What would you recommend getting? I didn’t see anything mentioning an 18” only a 15”, but I would like to get the same barrel length or at the minimum of a 16” length. I believe I was looking at JP, but need more info on what is best. Preferably an adjustable gas block, as that is how I can go from 223 to 556 caliber (at least I think that is how that would work). Still new two this platform. I’ve had mine for just over a year as of February. Any tips would be great! Also I prefer to do everything myself, if at all possible without having to go to a gun smith.

Watched the entire video and it seems you explained everything except the theory behind how & why the gas tube system works.
Oh well, I still gave it a thumbs up because now I am qualified to determine the correct size and length if all those thingamajigs. 😉

I have a 20" M16 style AR-15 with a rifle length gas system.
I want a conversion to either .350 or .450 but it seems that rifle length .350 or .450 uppers are extremely rare. Few are mid-length, most of carbine-length.
Are there any alternatives ?

That was worthless

What if you don’t know what the gas port size on your barrel?

I’m building a 16 inch mid length .750 adjustable gas set up with a rifle A2 buffer/stock kit. Would you think it will function with that set up, or would it need a carbine buffer set up?

I’m running a 14.5 barrel so the right gas line would be mid length? And what buffer should I get?

I've built close to 20 ARs now over the years, and EVERY time I do an 18'' with mid length gas, and carbine extension tube and buffer (from different manufactures), I always run into the same issue. It does not cycle properly, doesn't hold bolt open when testing with 1 round in mag 50% of the time. I've used 3 different solutions. (1) Lighter buffer. (2) Softer spring. or (3) cut 1 ring at a time, then test fire, until bolt holds open, from the current carbine spring until reliably cycles (cheapest and fastest option)

the best explanation video ever about the topic … we really appreciate you bro.