Magpul Mags on my Norc M4

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SpoonMan

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Hi folks,
I whent to the range this morning for the first time with my new Norc M4. I had my 2 original mags and 2 bran new P-Mags. Everything whent well exept that for some reason that I could not figure out why, after shooting the last round with my P-Mags the bolt wouldnt lock back.It did just like if I had another round in it. No problem with the original mags. Is this a knowed issue with the P-Mags and the M4?

The p-Mags fits in nicely and locks in place without any problem. Any body else with a Norc M4 and P-mags that had this problem so far?

Thanks for your help

SM
 
the magazine follower spring is not strong enough to push up on the bolt catch.

if u strip the p mag and stretch out the spring some it will cause enough force to catch the bolt.
 
Did you try unloading the gun/mag... Close the bolt, insert the pmag, pull all the way back on the charging handle?

Because it should lock the bolt back. Let us know what happens
 
If anything I'd say the gun is slightly short-stroking, just enough to function and appear normal with the Norc mags, but not enough for the hold open to work with the Magpuls.
A good cleaning of carrier group and buffer tube/spring would probably be all that is required.

Definitely DO NOT stretch the springs; when springs are stretched they are damaged/weakened.
 
p-mags

Im inclined to agree with last post,might be your ammo.,poor quallity can sometimes give you a finicky response.may fire/cycle Ok but ??? Also p-mags sometimes need to be tuned for fit.
 
Danimal247 said:
the ammo should not matter if the "crappy" stock mags work and the magpul mags do not while using the same rounds
Click to expand...

The ammo will matter, if it lacks the power to lock the bolt onto the magazine follower.

This will cause the problem the OP is posting.

To the OP I would try to give the upper a real good cleaning and lubrication. Scrub the BCG, bolt, and the upper.

And the Magpul mags as said need sometimes to be tuned. The magazine springs stretched etc.
 
if the stock mags work with that ammo, then why wouldn't the magpul mags is what I am saying ... doesn't make sense, especially when "upgrading" from the cheap stock mag
 
Do the Pmags work in another AR that is not a Norinco? If they do, what would you think the problem is? The Pmags or the Norc?

I'm not surprised Pmag don't work in a Norc. After all, a Norc does contain other parts that have no commonality with North American ARs. In simple terms, not all square pegs fit into a round hole.
 
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People dont seem to grasp that with Norincos is even though they mostly work, its a crap game as to what their tolerances are between different examples. I have seen many examples on thier 870 copies where some have widely disimilar fastener, sizes and measurements. You buy a Nork and you get what you get. Some are good, some are garbage and some work ok but thier specs are still off.
 
zupermann said:
Sometimes it depends on how the mag has been "pinned". If it has a rivet or set screw in it, the mag feed spring can get hung up on the said rivet/set screw, causing a very weak feed/malfunction.
Click to expand...

This is my guess.

I have a norc lower on a CQB upper that I shoot the pi$$ out of, and it is all out of pmags, except when I run a sub cal adapter.

I do know that the pmags I bought were pinned poorly, and I had to redo them.
 
The Pmags in my CQ-a work fine...lock back no problem...sounds like something out of spec with yours (possibly).
 
NorCalDustin said:
Did you try unloading the gun/mag... Close the bolt, insert the pmag, pull all the way back on the charging handle?

Because it should lock the bolt back. Let us know what happens
Click to expand...

I try that and it worked out fine. The bolt stays OPEN with the P-mags just like it does with the original mags. I use Winchester ammo and i'll try a different kind of ammo next weekend. I did clean the upper and lower this morning like someone else as suggested.

Will keep you posted on next weekend try out.

Thank's
SM
 
I'm going to go out on a limb here and say

The problem isn't the Norinco rifle. The problem isn't the Magpul magazine springs.

The problem is the capacity-limiting pinning job, which has interfered with the spring.

Either return the magazines for exchange or refund or take the rifle and magazines to a gunsmith.
 
Wendell said:
The problem isn't the Norinco rifle. The problem isn't the Magpul magazine springs.

The problem is the capacity-limiting pinning job, which has interfered with the spring.

Either return the magazines for exchange or refund or take the rifle and magazines to a gunsmith.
Click to expand...


Easily diagnose by feel. When you press down on the Magpul follower does it feel super-soft compared to the norc mags?
 
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