Hot brass tearing into my Ruger PC9 Magpul backpacker stock

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762Availlability

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Hey everyone,

As mentioned above I have the brass tearing into my Ruger PC9 Magpul backpacker stock right at the ejection port (Photos will follow shortly). I shot about 400 rounds, no jams, no stoves pipes so I was quite happy with it until I saw the damage that did to the stock. Anybody else experienced this? Is there something I can change or do to prevent this? I would like to keep my firearm in as best of a shape as possible.

Thank you,
762
 
Maybe try a Mcarbo extractor and see if that tunes the faulty ejection trajectory.
Compare the ejectors between the two inserts your gun came with (Ruger mags and glock mags) and see if you can spot any differences that explain the faulty ejection trajectory.

Are you using the Ruger mags insert or the Glock? Sometimes its possible to tweak the ejector on some guns or re profile it to tune the trajectory..... but it should be good to go out of the box.

It should be easy enough to get a replacement module.
 
It's not that common, the Ruger's are known for their reliability, the extractor that Mcarbo makes is just an upgrade in so much as it's a better machined part and many people enjoy upgrading.... that said if you had a bad extractor that had a quality control issue it would make sense to put in an "upgrade".... most people won't because their guns run fine.

The ejector is probably a more likely issue for you, maybe it got bent somehow? Compare the two modules that came with your gun and see if you can spot an obvious difference.
 
762Availlability said:
I didn't know that ejection problems were common enough for Mcarbo to make a part. BulleyesNorth has it on sale for 50$, thanks for the tip.
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Haha, well, MCARBO makes lots of parts that aren't exactly solutions to problems...

FWIW, you should be able to warranty something like this. (it probably wouldn't be my first choice though)
 
Can-down said:
It's not that common, the Ruger's are known for their reliability, the extractor that Mcarbo makes is just an upgrade in so much as it's a better machined part and many people enjoy upgrading.... that said if you had a bad extractor that had a quality control issue it would make sense to put in an "upgrade".... most people won't because their guns run fine.

The ejector is probably a more likely issue for you, maybe it got bent somehow? Compare the two modules that came with your gun and see if you can spot an obvious difference.
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I've kind of noticed the opposite. Probably a third of the Ruger PC Carbines I've seen have had extractor problems (3 or 4 out of a dozen or so), that have been solved by replacing the extractor with an aftermarket. They're great everywhere else though.
 
Scotty454 said:
I've kind of noticed the opposite. Probably a third of the Ruger PC Carbines I've seen have had extractor problems (3 or 4 out of a dozen or so), that have been solved by replacing the extractor with an aftermarket. They're great everywhere else though.
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I've heard that but haven't seen it, what is the issue with the factory extractors?
 
762Availlability said:
I will check if its still under warranty.Good idea.Thanks
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Have you tried it with both magwells to perhaps rule out the ejector? Are you handy with tools and a good trouble shooter?
Warranty could be along wait but if your not handy with tools might be your best option.

I'd love to see those pictures you mentioned last week in your first post to see how bad the damage is.... maybe you can shield the area being impacted while you try and figure it out, but perhaps the damage is already to the point that more is not an issue?
 
Can-down said:
Have you tried it with both magwells to perhaps rule out the ejector? Are you handy with tools and a good trouble shooter?
Warranty could be along wait but if your not handy with tools might be your best option.

I'd love to see those pictures you mentioned last week in your first post to see how bad the damage is.... maybe you can shield the area being impacted while you try and figure it out, but perhaps the damage is already to the point that more is not an issue?
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I did switch thr magwell to the glock one as I intend on running pmags. 1/3rd of the price of the rugers. The reason I have not posted a picture yet is because I am away from the gun at the moment put I will as soon as I get home. Might as well switch back the wells and see if the problem persist. Just too bad the stock has been damaged already. I wanted to keep it free from wear and tear as long as possible.
 
The extractor (bad extraction angle and made from cheap steel), extractor & bolt head pins (mild steel on a wear point? No Thanks), and the spring retention C-cup (stock is polymer. wtf Ruger?) are all known weak points on the Ruger PC Carbines. Tandemkross and Mcarbo both make tool steel replacements and I highly recommend changing all those parts. Even if you do nothing else to the rifle.

Cheers,
ACD
 
Scotty454 said:
I've kind of noticed the opposite. Probably a third of the Ruger PC Carbines I've seen have had extractor problems (3 or 4 out of a dozen or so), that have been solved by replacing the extractor with an aftermarket. They're great everywhere else though.
Click to expand...

Mine ran like hot garbage after it’s first 1000 or so til I swapped my extractor and switched to factory glock mags, super reliable now, and after several thousand more rounds I don’t recall a single hiccup,
 
Scotty454 said:
They uhh, don't extract good sometimes?
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uhh like left behind in da chamber? ....or more like hot brass tearing the stock a new hole due to poor ejection trajectory?

Were all your problems similar or did you expereince different extraction issues that were not good?
 
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AlphaCharlieDelta said:
The extractor (bad extraction angle and made from cheap steel), extractor & bolt head pins (mild steel on a wear point? No Thanks), and the spring retention C-cup (stock is polymer. wtf Ruger?) are all known weak points on the Ruger PC Carbines. Tandemkross and Mcarbo both make tool steel replacements and I highly recommend changing all those parts. Even if you do nothing else to the rifle.

Cheers,
ACD
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Thanks, I bought both those parts right after buying mine but have not switched out the extractor. My gun has under 1000 rounds through it though.
 
AlphaCharlieDelta said:
The extractor (bad extraction angle and made from cheap steel), extractor & bolt head pins (mild steel on a wear point? No Thanks),...
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Mild steel extractor, seriously? That's BS. But I guess it works well enough, enough of the time that it's not worth it for Ruger to use better steel. Disappointing, but I guess it's not all that surprising.

I mean, my understanding is that straight blowback guns don't really "extract" using the extractor during firing, so all the extractor is really doing is providing a pivot for the ejector to push the case against. But it does seem awful cheezy, Ruger.
 
Can-down said:
uhh like left behind in da chamber? ....or more like hot brass tearing the stock a new hole due to poor ejection trajectory?

Were all your problems similar or did you expereince different extraction issues that were not good?
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Pretty much always stovepipes. No extracto.

Like this- (Not my pic, for illustrative purposes only)
1678070548104-jpeg.190656
 
Thanks Scotty, I consider anything that clears the chamber to be extracted and if it clears the receiver it's ejected.... stove pipe is a no ejecto in my terminology but I appreciate the clarification on what you were experiencing.
 
alpining said:
Mild steel extractor, seriously? That's BS. But I guess it works well enough, enough of the time that it's not worth it for Ruger to use better steel. Disappointing, but I guess it's not all that surprising.

I mean, my understanding is that straight blowback guns don't really "extract" using the extractor during firing, so all the extractor is really doing is providing a pivot for the ejector to push the case against. But it does seem awful cheezy, Ruger.
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If the chamber is sticky the extractor will need to pull on the case, mostly I'm not sure if I have had 9mm cases left behind in any of my Carbine's. it's usually been .22lr's that do that.

I don't think it will be hard for Ruger to make some changes to address the issue, meanwhile it's more business for the good folks at Mcarbo.
 
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