Norinco carbine trigger reset issues

[BigMT]

I recently purchased a semi auto Norinco Uzi clone for cheap, being warned it didn't work very well. The issues that it had were a loose grip stick, mag height was wrong, the magazine catch was missing, the barrel was rusted out, and more.

I replaced the magazine catch and barrel with new old stock parts, tightened the grip stick back to the receiver, and it feeds 100% from IMI and German mags now.

The main problem remaining is that unless the trigger is pulled very hard it doesn't reset properly. This happened before I messed with anything and nothing I've changed so far has fixed it. When function testing I found that pulling the trigger gradually releases the striker but doesn't reset the trigger until it's pulled further back, so that when trying to cycle the striker isn't caught again and just follows the bolt forward. The only reason I know the mags feed fine when it cycles is that if the trigger is really jerked back in one rough motion it resets fine and feeds with no issue.

What should I look at replacing or adjusting to fix this issue? Any pointers or advice is greatly appreciated! I just want a functioning Uzi to target shoot with at the range.

 

[gunsmith]

rusted barrel

Do you want to sell the rusted out barrel?

 

[BigMT]

Do you want to sell the rusted out barrel?

I already passed it along to a friend with a registered bolt for a range use barrel, sorry. Do you have any input on what I could look at on this trigger issue? Failing everything else I may just replace pieces one by one and see if anything works.

 

[timo]

Sounds like its in the lower-but be sure bolt gap is ok. I don't know enough about the norinco. Be patient a lot of great uzi guys here.

 

[kanewtervalve]

I had issues with mine and replaced most of the internals on the lower, sub-par springs for sure, most of the parts were way out of spec with the internals on my Vector, shoots ok now, don't know if that helps.

 

[BigMT]

Sounds like its in the lower-but be sure bolt gap is ok. I don't know enough about the norinco. Be patient a lot of great uzi guys here.

The bolt gap is between five and fifteen thousandths, so that doesn't seem to be an issue.

I had issues with mine and replaced most of the internals on the lower, sub-par springs for sure, most of the parts were way out of spec with the internals on my Vector, shoots ok now, don't know if that helps.

I replaced all semi-auto compatible parts with IMI lower parts, including the springs. Unfortunately the problem remains. I guess the next thing to do is replace the semi-auto sear with a new one, then try the striker itself if that doesn't work.

 

[timo]

Is the sear semi or full ? If its full it might not be clearing Rec.

 

[BigMT]

Is the sear semi or full ? If its full it might not be clearing Rec.

The existing sear is a semi-auto but looks to be the same rough manufacture as many of the parts in the lower were.

 

[timo]

It sounds like something is out of spec-Ck if the sear is clearing.

 

[BigMT]

It sounds like something is out of spec-Ck if the sear is clearing.

It clears the receiver with a bit of room to spare but releases too soon or resets too late depending on how you want to look at it.

 

[timo]

If you have the bolt out and you squeeze trigger does sear work ok.

 

[timo]

Take a picture of the lower off the gun with the sear released. Some parts can't be interchanged. If I recall the sear will hit that little w shaped spring in lower.

 

[BigMT]

If you have the bolt out and you squeeze trigger does sear work ok.

I'll check this and take a photo of the lower with the sear forward as soon as I can. Thanks for the help so far!

 

[timo]

Go to this site UziHQ.com (BWE) you can see if you have the proper configuration in the lower.

 

[BigMT]

Go to this site UziHQ.com (BWE) you can see if you have the proper configuration in the lower.

I'm not seeing where to look on there for a proper configuration of parts in the lower.

Ah hah! I see what the problem likely is now. There's a new style trigger and disconnector in the lower with an old style semi auto sear. The engagement surfaces are different enough that it's releasing and resetting at the wrong times.

And of course the part I think I need is out of stock. I may just buy a whole semi auto lower just to have a functioning gun to plink away with.

 

[timo]

Just get a smg lower and weld a stop in it and cut the sear so it will make proper contact with striker. Its whole lot cheaper http://uziparts.com/UZI-RECEIVER-PARTS_c3.htm this shows what works with what

 

[BigMT]

I made a semi auto group from a parts kit real quick today. The problem is still there though. My suspicion is that the striker dimensions are incorrect causing the trigger to release the striker too soon but I don't have a known good striker to compare with.

Sure glad I didn't just buy a semi auto pack! Thanks for that idea. Anything similar for the striker bar? Are there dimensions available somewhere so I can check without buying any other parts?

 

[timo]

Take a picture of striker with measurements and I will measure mine also and compare

 

[BigMT]

Take a picture of striker with measurements and I will measure mine also and compare

Thanks for all your help. Hopefully this is the issue because if it isn't I'm not sure what else to look at. Here are the photos.

The measurements are primarily about the long bar on the striker.

0.464 tall
0.194 thick
4.691 long from tip to back at longer point
4.622 long from tip to back at shorter point

It seems like the striker is badly dimensioned on the front where it would contact the sear and that's allowing it to slip off before the disconnector resets. Would you be able to take a photo of the front of the bar and take some quick measurements so I can make sure? Worst case scenario I'll build up some steel on there, bring it to the right dimensions, and case harden it.

EDIT After looking at this some more I've found that there's a sweet spot on the trigger where I can pull just enough to have the sear clear the receiver and let the striker go forward but it won't reset. What the heck could be causing that? Whatever it is it's happening with the new semi auto trigger group and the Norinco and the IMI I had in there before making this semi auto group.

 

[Ulwembu]

That slant cut on the front of the striker is something I haven't seen in the 6 original Norinco 320's I held and took apart...