Any 1911 9mm gurus or gunsmiths our there?

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JD22-250

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Would any of you consider yourselves a 1911 guru. I need help diagnosing a problem with my norinco np 29 9mm. It ran 400 rounds flawlessly but now jams every single round and I can't track down the problem. The gun feeds just fine but when fired it doesn't eject and the slide jams up solid,
The only way to get it free is tap the barrel back. Then eject the round by racking the slide. The casing doesn't seem to be jammed in the slide at all. I can cycle mags through it by hand no problem any ideas? I have pictures I can send.

Thanks in advance
 
My sister had this problem with her STI Trojan 9mm. The problem turned out to be the ejector was getting pushed up by the mag, and rubbing against the bottom of the slide. Have a look at your ejector, if there's a little gap between it and the grip frame, try gently tapping it down with a brass hammer. If that turns out to be the trouble, you can modify/grind the ejector so it clears the mag.

Trojan Ejector Problem.jpg
 

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JD22-250 said:
But it only happens when fired. I can cycle with a mag in by hand no problem
Click to expand...

I just checked my Colt Competition 9mm and Norinco NP29. The ejectors are mounted solid in both of them. Do you notice any wear on the top of the ejector where it may rub against the slide? You could try putting some magic marker on it and then firing some rounds. Check after to see it's been rubbed off.
 
I have the same problem and so does a friend of mine. and still have not figured it out. Mine has about 12k rounds through it. His had about 6k when it started to do it.
We can rack an entire mag through it with no problem. As soon as you fire a live round it gets jammed. Then it is hammer time.
I have or a gunsmith have done the following: rebent the extractor, replaced the extractor on one, replaced the barrel lug, put an over sized firing pin stop and filed it down to fit tight.
We are kind of out of options. Ant help would be great!

Thankx.
 
Raymond.Emsley said:
I think the problem with that is, we can't get a round out of it to check. At least with our 2 we can't. I think the op had the same issue.
Click to expand...

If it's the ejector binding on the slide, when you have tapped the slide back to remove the spent brass, you should be able to strip and check the ejector to see if the magic marker has been scraped off.
 
Raymond.Emsley said:
I have the same problem and so does a friend of mine. and still have not figured it out. Mine has about 12k rounds through it. His had about 6k when it started to do it.
We can rack an entire mag through it with no problem. As soon as you fire a live round it gets jammed. Then it is hammer time.
I have or a gunsmith have done the following: rebent the extractor, replaced the extractor on one, replaced the barrel lug, put an over sized firing pin stop and filed it down to fit tight.
We are kind of out of options. Ant help would be great!

Thankx.
Click to expand...
This is exactly exactly my problem: fire a round and slide goes back 1/3 of the way ish and slide jams solid. Hit barrel back to unjam stuck slide. However an cycle a whole mag of rounds by hand absolutely perfectly
 
JD22-250 said:
This is exactly exactly my problem: fire a round and slide goes back 1/3 of the way ish and slide jams solid. Hit barrel back to unjam stuck slide. However an cycle a whole mag of rounds by hand absolutely perfectly
Click to expand...

Cycling by hand is WAY less violent than shooting the gun. Forces all coming from different directions AND vibration so probably won't jam up.
Like others have said colour everything that may make contact, fire it, disassemble however you can and see what has rubbed off.
 
I am always about looking at something logically and proceeding from there: usually a fresh eye even if they are not an expert can help.

If the above photo is the point of the issue I see several things:
- that doesn't look like the slide has traveled far enough back to start the ejector to come into contact with the casing
- that seems to be the point at which the hammer is now in contact with the curvature of the firing pin stop

Could there be an issue with the hammer's interaction with the firing pin stop?

Just a random thought in case something un-thought of is the real issue. :confused:
 
Then it has to be:
- a slide to barrel interaction problem
- a slide to hammer interaction problem
- a slide to magazine interaction problem
- a slide to frame interaction problem
... or something else I can't think of right now. :confused:

My hope is to "jog the memory" of another CGN member reading this by throwing around ideas. So... let me throw around a few crazy ones for sh1ts and giggles...

Is the hammer jammed between the firing pin stop and the slide body? That could jam it solid by lodging in any space in there.
Is the recoil spring guide have the proper ears on it, it's not rolling in the frame? A rolling guide could jam up the barrel's downward motion on recoil.
Is the barrel link pin and the barrel link that holds the barrel to the slide stop okay? Another object that can impede natural barrel drop out of its locking lugs.
Have any of the roll pins started to "walk" out? A moving object now moving an an unintended angle causes problems.

I assume the slide is not moving enough for the slide stop to reach the take-down notch where the slide stop pulls out of on the slide, if it was it could be walking and jamming.

I am not in any ways a 1911 guru at all. I am just looking at the exploded and "x-ray" diagrams of a 1911, along with the Vikers Tactical slow motion cut away 1911 video (https://www.youtube.com/watch?v=jig-RvZr1OM) to try and figure out where the jam is happening.

Overall, think inside the box (gun) and good luck! :yingyang:
 
Maybe check to make sure the slide stop lever is properly fitted through the hole in the barrel link? If the barrel isn't properly secured to the frame it might cause the barrel to move rearward with the slide, failure to extract, and consequential jamming.
 
Cranberry said:
Maybe check to make sure the slide stop lever is properly fitted through the hole in the barrel link? If the barrel isn't properly secured to the frame it might cause the barrel to move rearward with the slide, failure to extract, and consequential jamming.
Click to expand...

That's a valid point...hadn't thought of that....
 
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