Old reliable and a new issue!

[sfsmedic]

So the trigger issue was pretty straight forward and was fixed easy enough. Got a new problem that is probably just as easy to diagnose but figured id toss it out there for input as I value the opinion of people on this board.

Failure to extract then inducing a double feed. Once the round mag is cleared and the second bullet is cleared a cycle of the bolt will extract the fired round in the chamber. The lip of the round in the chamber is slightly deformed. It started when I went to a red tac spring and H buffer. Reminded me of an overgassed issue so tried an H2 buffer. Issue increased in frequency so put the stock spring and buffer in and now it does it every round.

Rifle is a 1:9 twist car gas with a metric F'ton of rounds through it. I took the extractor off last night and cleaned it well. Tension felt ok.

My diagnosis to repair it would be replace extractor spring, extractor and pin (as the pin is pretty loose). I believe the buffer spring and buffer change were a non issue just poor timing in testing them.


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[Ratdog68]

You might wanna change the name of this gun. LOL Me thinks you're on the right track with the spring/extractor/pin. Is it time to clean the chamber too?

[sfsmedic]

I used to call it the neater rifle lmao. Which may explain alot too. The chamber was cleaned this morning! I think the poor things just been ran hard and put away wet. Lmao. Parts are just starting to wear out is all. So time to start replacing parts. Took my niece shooting for her first time so glad she had got to put alot of rounds through it before this happened as she was having lots of fun with it.


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[-k-]

Replace the extractor spring. I would also add an O-ring.

Do you shoot steel cased ammo? The chamber fouling from steel cased ammo can be very hard to completely remove with normal cleaning.

[sfsmedic]

Replace the extractor spring. I would also add an O-ring.

Do you shoot steel cased ammo? The chamber fouling from steel cased ammo can be very hard to completely remove with normal cleaning.

No steel cases ammo. I agree it's probably only the spring and insert but I figured I may as well have the other parts on hand just in case. Thanks K.


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[68WJ]

As mentioned, extractor and spring are the easy replacements. A good chamber scrub is in order too. The damage to the case lip, if I am reading it right (probably not), might indicate that the case is extracting, but not ejecting free of the bolt face and being rechambered. Ensure that you have good spring tension on the ejector.

[sfsmedic]

It's not extracting and re-chambering because the bolt is stripping another round off the mag and trying to feed it into the already occupied chamber. Ejector has plenty of tension. It's definitely in the extractor department.


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[OC455]

Extractor spring & insert...O-ring might help too.

[sfsmedic]

Btw replaced the spring and inset. The culprit was obvious once it was apart.

Even with the extractor off the bolt the spring looked normal but gave a slight tug on the spring and it broke into two pieces so it was either broken or on the verge of being broken.


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[FrankT]

You gotta love these guys with all the help these guns are going to run well, thank for the pic.