Norc Safety - Problem - Need Confirmation

L

lmar

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Can I have other CQ 5.56 owners try the following:

With gun unloaded (mandatory safety blurb) and nothing in the chamber....
Rack bolt back and let it come back on an empty chamber.
Move safety from safe to past "semi".
With the gun pointed in a safe direction pull the trigger.

On my gun the safety moves from the "overextended" position back to semi as you pull the trigger. As soon as it gets to the semi position it goes (click).
Repeat. This time shoulder the gun as if you would shoot it before pulling trigger. Due to the amb safety I cannot pull the trigger back as my trigger finger prevents the overextended safety from moving.

During the rifle operators course I had a couple of fail to fire episodes where the safety wouldn't disengage.

I suspected it was an over-travel issue but was unable to determine exact mechanism.

Next question is how do I fix it now that I know what is wrong.

Note - I have a Magpul MOE pistol grip on the rifle - I had to cut the springs in order for it to work (Norc grip hole for spring ball detent spring is deeper than Magpuls) as factory spring would lock up safety tight with MOE. Suspect I'll have to put in a spring somewhere between factory and my "cut" length.

L
 
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Interesting...I just put a Magpul MIAD grip into my Norc and I didn't have to do anything with the spring...and it works fine. Just had to make sure the spring was in the right spot as I was installing the grip.
 
lmar said:
Next question is how do I fix it now that I know what is wrong.
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hammer.jpg
 
Are you sure the spring and change lever detent pin are installed in the pistol grip ?
If the rifle is cocked the only 2 spots the selector should be able to move to are safe and semi auto .If the action is fired the selector lever should not be able to move off semi.
 
I believe you pretty much answered your own question... You should not have to cut the spring you spoke of at all. I did not cut it on my Norc and mine functioned flawlessly.

There may be other issues as well, but I think you know where to start.
 
lmar said:
.....Note - I have a Magpul MOE pistol grip on the rifle - I had to cut the springs in order for it to work (Norc grip hole for spring ball detent spring is deeper than Magpuls) as factory spring would lock up safety tight with MOE. Suspect I'll have to put in a spring somewhere between factory and my "cut" length.

L
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If my understanding is correct, the rifle worked normally.
Then you modified it.
Now it doesn't work properly.
That would suggest that your modifications are the root of the problem.
You suspect that you cut too much off the detent spring. That could be a place to start.
Get a new spring, and if it needs to be shortened, go at it incrementally, testing with each slight modification.
 
Damn I hate to be a Norc fan boy but tossing out the rifle is not the best solution. As posted above, it seems likely that the OP cut the detent spring and he did not have to. I have put both an MOE and MIAD on my Norc (no, not at the same time :p) and did not have to change springs.

It seems what is happening is the safety is over rotating because the detent spring is no not placing enough pressure on the detent pin. Are you sure the detent is actually still in place and the right way round?

I would say get a new spring and reinstall the grip.
 
With plastic parts you should always clean out holes for casting slag,I bet the spring got held up on a small piece of crap giving the impression that it was to long

Seeing as your this far in...might I suggest a slight polishing of the detent,some 600 or 800 grit will do nicely. Attention to some of these extremely small details/detents will mean the difference between a safety that works,but is gritty and stiff and a smooth engagement/disengagement. This also goes for bolt hold open pivot. polish only...do not remove material en'mass untill you learn what you can and cannot do safely. These are some of the things you will find different between an entry level gun and a high end gun.Fit and finish ARE critical if you want to build a smooth great running rifle.
 
blaxsun said:
Me, I'd burn it.
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Hey, it's Christmas, send it to me before before burning anything. I'll happily take another Norc AR, even better if it is the new 10.5" model. ;)

As for OP, I tried to over-rotate the safety on my Norc M4 and it won't go past the SEMI stop. I pushed hard enough to start worrying about breaking or bending something and it simply won't go farther. I say look at the grip installation, just like everyone else says.


Mark
 
blaxsun said:
Norc's are notoriously finicky with aftermarket parts. If you're not able or prepared to spend the time painstakingly tweaking each, I might suggest investing in something like a NEA, RRA, Stag or LMT.
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My Norc is my first AR, and I just spent a couple of hours with a file tweaking a Dlask trigger guard so it would fit in my Norc lower...I guess the definition of "drop in" depends on what it's going into...lol.
 
blaxsun said:
I didn't say toss it out... I just suggested that if you want to start "tweaking" with aftermarket parts - the Norc isn't necessarily the platform to do it on. Me, I'd burn it.
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I some cases, yes. But in this case it is a simple hand guard replacement and I don't think it is an issue with the manufacture of the lower.

I can't figure out why BAD and BAL levers won't work with Norcs but that is totally off topic. :D
 
tiriaq said:
If my understanding is correct, the rifle worked normally.
Then you modified it.
Now it doesn't work properly.
That would suggest that your modifications are the root of the problem.
You suspect that you cut too much off the detent spring. That could be a place to start.
Get a new spring, and if it needs to be shortened, go at it incrementally, testing with each slight modification.
Click to expand...

I've also observed this with two stock Norcs with no aftermarket parts.
Since I don't have a stock Norc to compare - I asked if other people could try it with their Norcs to see if it was consistent between first generation, modified, or second generation Norcs.

L
 
Bolivar said:
Damn I hate to be a Norc fan boy but tossing out the rifle is not the best solution. As posted above, it seems likely that the OP cut the detent spring and he did not have to. I have put both an MOE and MIAD on my Norc (no, not at the same time :p) and did not have to change springs.

It seems what is happening is the safety is over rotating because the detent spring is no not placing enough pressure on the detent pin. Are you sure the detent is actually still in place and the right way round?

I would say get a new spring and reinstall the grip.
Click to expand...

Don't tell him that!

I'll gladly pay him $50 for the "broken" rifle and take it off his hands. I'll even pay the shipping.

Seriously though, if you did a mod and the rifle stopped working, reverse the mod. If the rifle goes back to working, you have your answer and then you can decide how too proceed.
 
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