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From Arvid on Utreon:
“Why does an AR-15 need a buffer thingy? Why can’t it just have a spring like every other normal gun?”
The Ar-15 really doesn’t need the buffer and tube, but it is a holdover from the origins of the system: the AR-10. The intent of the AR-10 was to create a 7.62x51mm battle rifle that was very lightweight (under 7 pounds, originally) but still soft-shooting and controllable. In order to do that, Eugene Stoner. has to pull out all sorts of tricks. As it applied to our question today, this included a straight-line design with a buffer on the end of the bolt carrier to absorb any residual impact of the bolt carrier on the end of the receiver tube. At this time, there was no apparent need to allow for a folding stock, so the bolt was allowed to run the full length of the stock to minimize felt recoil.
After the basic design was put in place, the disassembly was changed from sliding together to pivoting, and this required splitting the single very long bolt carrier into what we now recognize as the bolt carrier and the buffer. When the design was scaled down to the AR-15, the basic architecture stayed the same, even though the recoil-reducing elements were not really necessary in the new smaller cartridge.
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Me: "Wow, that's a lot information squeezed into 10 minutes"
Looks down
Video is at 3.03. Jesus, you're informative. Thanks!
it is neat how the little barrel extension takes the place of a whole "receiver" technically it should be the "receiver" cause it is what the bolt locks into and it holds the barrel i guess its really like an ak47 trunnion but it has a little flat where a serial number can be visible
with the buffer what about the bolt carrier bounce that can happen rarely if in full auto the carrier hits the trip releases the hammer and at the same time the bolt carrier slaps into the barrel extension then kicks back a little bit and can unlock it just enough that the hammer hits the bottom of the carrier instead of the firing pin leading the person to think there was a primer failure
Another great question and answer! "Buffer Thingie"
Hi Ian it's Ian love your channel keep it up.
Bolt carrier back half… it is just so the receiver can split in half. It is half of the reciprocating mass. it is not a 'buffer' except in an inertial sense. The piece of plastic in the back is a buffer. Miss definition in terms. Not a buffer tube, it is a receiver extension tube. Stop calling it the wrong thing and people will stop being confused. Eugene was an 'engineer' in the worst sense.
4:48 – funnily enough this is how a lot of early airsoft AEG replicas of AR pattern rifles are taken down because the single-piece hop up unit has to attach to both the barrel and the magazine well to feed BBs into the barrel. Dunno if this is still the case (I haven't played airsoft in well over a decade and I know split level hop ups were a thing at least as far back as like 2007), but it's cool to learn that precedent was actually set all the way back in early designs for the AR-10
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I would love to see a ar-10 chambered in sig 277 fury
It’s for keeping the dust out
Informative video with but I noticed an error. The bolt does not lock into the barrel, it locks into the barrel extension.
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Good video. I owned a S & W MP10 and had to send it back to them 3 times. Finally, I had some one look at it and found that they were putting AR15 buffer and spring and in an AR10. I had to send it to them again and they finally fixed it. I did understand wrong parts causes misfires, but now I totally understand.
EXCELLENT video bud!
With the new brace laws coming. That buffer tube will be truly appreciated.
VERY GOOD – THANKS ! ! !
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I wonder if the same could have been achieved with a recoil spring that would wrap around the barrel instead…
I'm also in a desert and sand "proof" is main selling point sometimes
I wish all gun owners would stick the thing in their mouth and start blastin'
I don't have an AR but this was very informative. Iv wanted a semi auto AR style platform for quite some time, but I waited so long to decide that that market is flooded with sooooo many parts and makes, I don't even know we're to begin. I would like to build it from the ground up, because I get familiar with things that way, like cars so on. I learn more about how it works and it makes me understand it better.
Huh, I guess that means there now needs to be a wwsd ar-10….
I've always wondered this, but never bothered asking. It's just been a way of the world to me.
Nice shirt 👕 👌
thanks
Great information
So it's a bit of an outdated system but it still works great.
It doesn't need one anymore, sure – but wouldn't the design still benefit the recoil nonetheless?
I've got to watch this again, it seems my attention span is just about 7 min 45 seconds.
Doing the Lord's work.
That was very interesting.
I just take it out and put my snacks in there
Mythbusters episode 136 shows a 1911 lighting a strike anywhere match. The slow motion shows the bullet leave the barrel, with the barrel barely rising. Then the slide hits the stop, the barrel flips up. Very enlightening.
I can also attest to 6.8SPC not really needing a buffer. In fact, when I converted mine to use an Adams Arms piston kit, the buffer made it too heavy to cycle properly. I installed a lightweight 2 piece plastic buffer system, which weighs basically nothing, and now it runs smooth like an engine all day long.
Now I want an AR-10. Thanks Ian!
That’s an excellent answer. Always wondered this but never took the time to look it up.
Great video, but I would have liked to have seen what you are talking about. Many of us are new to the mechanics of the subject, and I had to go somewhere else to see what parts you were actually discussing. But still… love the information.
They use shrinks so only the little bitches who will never fight back can own guns . Congratulations on being a little bitch . Government loyalists are American traitors
You don’t realize how important that thing, it’s weight, and if it rattles or not is until you put an echo trigger in and fight with it to get it to cycle properly.
Great video
So what you are saying is…. The USA is full of racists and homophobes…..?????
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Lets hope Ian could get his hands on AR16 in 7.62×51 the progenitor of AR18/180 and their derivatives.
I had a green plastic toy rifle (very same as shown in this video illustration) when I was young, being used to Garands and carbines, and even 1903 Springfields as my plastic arsenal, I really didn't understand what that new design was all about, but I knew it looked cool and it probably became a laser gun when needed, boy oh boy would I love to have one of those rifles today, before they're deemed scary and illegal
This was really well explaned. You learn something new every day…
Thanks Ian