Quoted:
Quoted: I would still try the Oring just in case. i have never run a AR with out one and never had any sort of problem.
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+1
I think you are over analyzing the problem. My pistol was doing the same and I just put an o ring around the extractor spring and it fixed the problem. Try the cheap easy aproch first.
I doubt the case was falling out on its own after the gas pressure in the barrel lowers. The extractor is extracting it out of the chamber just can't hold on to the case long enough to extract it out of the weapon.
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As part of the troubleshooting after my earlier posts I did try the o-ring solution.
The extractor just dug into the brass more aggressively and I was concerned the extractor would eventially break off.
Don't misunderstand, I think the O-ring has it's purpose and I'll probably use one all the time.
But we're talking a deformation ring on the brass caused by a groove in the chamber that can be seen just by probing with a dental tool.
I personally wouldn't call that over-analyzing. But I'm often accused of it!
I'm just pointing out reality.
If I hadn't stuck with trying to solve the problem like many folks I personally talked to suggested, where would I be now?
They wanted me to send the gun to a gunsmith, back to the factory, etc, etc.
So I didn't and stuck w/ it and now we all can share the knowledge gained. I know I've learned a heck of a lot...
Your next point, that the case is still being "extracted" and that you doubt that it is being blown out.
Well, if that's the case, then why is the case not being ejected out of the ejection opening and instead ending up laying in the chamber or being squished when firing one round from a mag?
If your pistol was doing the same as mine and the brass had a deformation ring and I bought it from you, then I'd sure do a little analysis to find out why I needed an O-ring to make it run.