AR15 Extractor Issues?

Sniffer

Sniffer

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I'm pretty sure the extractor on my AR15 is the cause of the double feeds / stove pipes etc I been experiencing

What seems to happen is that the extractor grabs the fired case, drags it out of the chamber but doesn't chuck it. Instead it stays perfectly straight and jams when the bolt slides forward to strip another round (usually looks like the old case and new round are both trying to get crammed into the chamber)

Is this an extractor issue? What can I do to diagnose / repair this? This is a 7.62 x 39 rifle / BCG if that makes a difference.

A picture is worth 1000 words.

AR15 Extractor.jpg
 

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I believe it’s more of an ejector problem than the extractor. By the sounds of it the extractor is doing it’s job by pulling the case out and holding on to it. It’s the ejectors job to kick it out. I would test out the ejector. Maybe take it out and clean it or replace the spring.

Pull the bolt out, place an empty case on the bolt under the extractor and see if you compress the ejector spring. If you let go, it should kick the case out towards the ejector
 
I have this same issue with my PWS MK111 with norinco 223 ammo. Extracts, failure to eject then leads to the jam in your picture.

This happens to me every round with a lower gas setting. Once I increase the gas setting, this happens maybe 1 out of 15 rounds. I experience no such issues at all with AE XM193 or XM855. So makes me think its gas pressure related.

At the same time, my MR223 goes through hundreds and hundreds of the norinco 223 without any issues at all.
 
I had this happening with an AR15 in 5.56.

Extractor spring was weak and not holding on to te empty case long enough so the ejector would be doing its job too early, kicking the case inside the upper receiver and causing this kind of jam.

I'd say look at both extractor and ejector:

-is the claw in good shape and grabbing on a cade properly
-extra strenght extractor spring/o-ring
-dissamble bolt and clean ejector channel
-replace ejector spring
 
Scharfschütze said:
I believe it’s more of an ejector problem than the extractor. By the sounds of it the extractor is doing it’s job by pulling the case out and holding on to it. It’s the ejectors job to kick it out. I would test out the ejector. Maybe take it out and clean it or replace the spring.

Pull the bolt out, place an empty case on the bolt under the extractor and see if you compress the ejector spring. If you let go, it should kick the case out towards the ejector
Click to expand...

This ^^^
 
Hmmm, yeah it does sound more like an ejector issue but I will strip it and check both.

So are all extractors / ejectors the same immaterial of caliber?

I`d imagine most BCGs out there are 223 / 556 but this AR is 7.62 x 39

Whatever is wrong it works fine 60% of the time, the other 40% is pretty much as I described (case consistently stuck on the claw of the extractor but not ejected so the bolt tried to strip a new round causing a double feed with one empty case and a live round)
 
How long is your barrel? What is the length of your gas system? It may be your rifle is over gassed. I had the same problem with a short barreled 7.62x39, I installed an adjustable gas block, dialed down the gas and the problem went away.
 
Sniffer said:
Hmmm, yeah it does sound more like an ejector issue but I will strip it and check both.

So are all extractors / ejectors the same immaterial of caliber?

I`d imagine most BCGs out there are 223 / 556 but this AR is 7.62 x 39

Whatever is wrong it works fine 60% of the time, the other 40% is pretty much as I described (case consistently stuck on the claw of the extractor but not ejected so the bolt tried to strip a new round causing a double feed with one empty case and a live round)
Click to expand...

It probably just needs to be cleaned. Strip the bolt and clean it up nice, if there is anything actually physically wrong it's probably just the ejector spring.
Being x39 I would guess it's just bunged up.

Are you shooting corrosive ammo?
 
cr5 said:
It probably just needs to be cleaned. Strip the bolt and clean it up nice, if there is anything actually physically wrong it's probably just the ejector spring.
Being x39 I would guess it's just bunged up.

Are you shooting corrosive ammo?
Click to expand...

No, non corrosive.

I`m gonna strip the BCG tomorrow and check things out
 
ISaidShotgun! said:
How long is your barrel? What is the length of your gas system? It may be your rifle is over gassed. I had the same problem with a short barreled 7.62x39, I installed an adjustable gas block, dialed down the gas and the problem went away.
Click to expand...

Interesting, this is a short barrel (7.5")

Could being overgassed stop it from chucking the case?

I`d don't remember it doing this when I first got it and I feel its gradually getting worse so I'm going to strip / clean / inspect first and see what I find but I will keep this in mind.
 
Sniffer said:
Interesting, this is a short barrel (7.5")

Could being overgassed stop it from chucking the case?

I`d don't remember it doing this when I first got it and I feel its gradually getting worse so I'm going to strip / clean / inspect first and see what I find but I will keep this in mind.
Click to expand...

If it's an NEA 7.5" barrel, they are notorious for being over gassed. I think that is caused by the pistol length gas system and with a large gas port.

A quick an easy test is to see where the extracted cases are landing. If they are being thrown (and with some authority) out at 1:00 position, then your gun is over gassed. Mine was getting beat up on the inside and the deflector was taking a hell of a pounding. Being over gassed, the bolt is flying back faster and more violently then it should be. So the timing is off, the rounds aren't being thrown out when and where they should be and getting stuck inside the receiver. You can try a heavier extractor spring, or a heavier buffer (H2). The heavier buffer will slow the bolt down.

I tried these things and ended up getting Superlative Arms Adjustable Gas block from CTSS supplies. They are currently sold out of the .750 size. https://ctcsupplies.ca/superlative-arms-adjustable-gas-block-bleed-off-solid-melonited/

And of course, this is only my opinion based on my own experience, your mileage may vary.

Good luck...
 
Has it always had issues or is this something new?

If it's done it from day one you're probably overgassed, if it's something that just started recently but was running great before it's probably the ejector is gummed up or the ejector spring is weak or broken.
 
When my homebuilt AR (223) did this, the solution was an extractor spring/o-ring.

If your extractor is _easy_ to move with just a finger, the spring is too soft. It should be very hard to move.

If you can find an extractor upgrade kit, buy two...
 
ISaidShotgun! said:
If it's an NEA 7.5" barrel, they are notorious for being over gassed. I think that is caused by the pistol length gas system and with a large gas port.

A quick an easy test is to see where the extracted cases are landing. If they are being thrown (and with some authority) out at 1:00 position, then your gun is over gassed. Mine was getting beat up on the inside and the deflector was taking a hell of a pounding. Being over gassed, the bolt is flying back faster and more violently then it should be. So the timing is off, the rounds aren't being thrown out when and where they should be and getting stuck inside the receiver. You can try a heavier extractor spring, or a heavier buffer (H2). The heavier buffer will slow the bolt down.

I tried these things and ended up getting Superlative Arms Adjustable Gas block from CTSS supplies. They are currently sold out of the .750 size. https://ctcsupplies.ca/superlative-arms-adjustable-gas-block-bleed-off-solid-melonited/

And of course, this is only my opinion based on my own experience, your mileage may vary.

Good luck...
Click to expand...

Thread revival!

I'm still having issues, this is a safe queen gun so it doesn't get a lot of time at the range but I did take it the other day.

I installed a new extractor, and new extractor & ejector springs. That made it run better but it still double feeds, basically the warmer it gets (from use) the worse the issue gets.

I also bought another bolt off the EE and tried that, it ran perfect for a few magazines and then broke the extractor!

One thing I did notice is that when it does extract / eject properly it fires the cases at 1 o'clock so that does point to an overgassing issue.

I'm thinking of getting a new heavier buffer from TNA but I dont know which variant? This one - link

They have it in H / H2 / H3 - can a buffer be too heavy? Im thinking of going H3 right off to calm things down a little.

Also is it possible the buffer spring has worn / relaxed to the point that its now part of the issue? If so should I replace it too?
 
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