How Does It Work: Direct Gas Impingement

How much gas assistance was there? When I fired the Australian SLR rifle it didn’t feel like much, as the recoil was a lot more than I was expecting.
Right or wrong, I expected gas assistance to cut down the amount of recoil.

Loved the video, especially since I haven't heard of some of the entries!

How is that not like an AR?

"Direct gas impunchment is same as rifle shits where he eats." -Ivan Chesnokov

Never trust the French

“A blind hole” ……………you mean a cylinder? Like a “gas cylinder”? And the gas tube where it goes in to it acts like a “gas piston”?🤔

My eyes burn just learning about that, all that gas has to go somewhere

Because…French

The mas44 is such a cool weapon system

I do wonder if changing ammo with different powders requires readjustment of gas ports and or return springs?

There is a swedish gun and its Egyptian Hakim knockoff that are also gas impingement in operation. Both the gas impingement and the AR with cylinder/piston in the bolt carrier group suffer from defecating where they eat. Means gases are blown into the action making it a dirtier gun.

You can clearly see how Eugene Stoner was inspired by this system when designing the ar-10. However (and no surprise) Ian is right .the ar-10/15 gas systems are internal long stroke gas piston systems. Delayed impingement,internal long stroke gas piston. The delay comes from that pressurizing of the bolt carriers gas chamber . It prevents the rifles from "slamming" open by giving a fraction of a second to build up pressure, the bokt carrier slowly (in gun operation time ) move backwards as it pressurizes .this time unlocks the bolt ,which also adds resistance. Right when the bullet exits the muzzle, and bore pressure drops off significantly the carrier has finally pressurised to it's full 2000 psi ,the bolt unlocks fully and the full speed rearward travel starts and the feed cycle begins. The piston itself is basically the stem of the bolt as it seals the pressure chamber with its gas rings allowing rearward pressure directly behind it. The Carrie is sort of the op-rod that unlocks the bolt and uses the inertia gained from the rearward gas pressure to cycle the gun. It is long stroke because the piston moves more than a certain amount of distance and retains the bolt . Short stroke piston systems typically moves less than an inch and are typically separate from the bolt and acting oprod. The mini14 is actually closer to a direct impingement design being that a fixed piston bleeds gas into a shallow, blind hole(and was designed by someone who did most of the work on the ar-15/M-16 project for Stoner at armalite ,had worked for the U.S. army on the m14 project and did a lot more work on designing several familiar guns ,L.James Sullivan).

I think you could have explained the differences better…. a rather confusing short for those who blindly follow every word….

How do modern assault rifles dont have to worry and mud getting inside the barrel
How does it work?

Thank you for your explanation! I wasn't sure myself. BTW, is the MAS system particularly reliable?

Like the sks

Yes.
Your standard AR is a hybrid gas piston system where the bolt carrier and bolt head are the piston system.

Now explain the difference between a hammer and a striker.

WOW – Thanks 😎👍

Ok nerd 🤓

I might be dumb with this one. Can someone explain what the difference between this an the AR15?

I’ve never heard the AR-15 being called a direct impingement gas operated system. Every time I’ve heard someone talk about its internals, I’ve always heard them say either short stroke or long stroke.

The action that truly sh*ts where it eats.

I had some direct gas impingement the other day

GAS

I wonder if those gasses are rough on scopes?

its kind of a tiny technicality to differentiate a small improvement. I'm sure part of it was Armalite patenting the piston

this sounds like the best way, keeping stress off the bolt itself, having the carrier take the stress

The framing of all your shorts is absolutely terrible, can't see anything.

Discrete !

So does this system keep the heat buildup lower than blowback system or it doesn't do anything better? Just another way to do the same thing but simpler

So the Gas tube venting the gas into the gas key on the bolt carrier in an AR15 isn't DI?

I guess I’m not really understanding the difference between this and what an AR has. Gas block, gas tube, vents to bolt carrier to cycle bolt.

I already knew about this, but I still appreciate, and enjoy, seeing the subject discussed so efficiently! Helps to have a proper example at hand.

Its "unreliable" but it also makes the gun much softer shooting and lighter

No. DI must be used on AR 15 because most of Gun nuts YouTuber said so….

Interesting. A superb [job] explaining and describing the difference between direct gas impingement and blow-back system.