2009 Norinco/Poly oprod issues

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M14Doctor

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So as I have had about 70 of these new 2009 rifles thru my mitts in recent months..... and have had numerous emails and p.m.'s from folks on this issue....... I am going to post this as I am curious as to how many folks are having this issue.

it rears it's ugly head in the following manner...
your oprod jumps from the slot it's in and the bolt comes free of the oprod pocket either during firing or when racking the oprod by hand it has a tendency to "bump" at the back of the stroke as it passes the take down notch.
how many folks have experienced this on thier rifles?
before i post a whole lot more I'd like to see a show of hands...... and then i'll type out a quick explanation on diagnosing the problem and fixing it at home.

anyone?
 
This has happened to me a couple of times on my 2009 poly. Only when racking , never while firing. To be honest, The thought never crossed my mind that it could happen during firing. Should I be worried?
 
Kratsnek said:
This has happened to me a couple of times on my 2009 poly. Only when racking , never while firing. To be honest, The thought never crossed my mind that it could happen during firing. Should I be worried?
Click to expand...

no, the thread is not meant to panic folks hehehe
if it doesn't do it while firing, this is good and should be piece of mind to you all.
it can happen during manual cycling depending on whether you apply upward pressure/angle while drawing it back... so this is not much of a concern unless it does it really easily and is accompanied by a binding bump (be sure it's not the take down notch that you are feeling).

where i am going with this is I have had several rifles (and some have posted about thier issues here in other threads) that there is a raised area in the receivers oprod track that is the cause of the problem and i have come across it enough to warrant starting a thread about it. The fix is easy and I'll get to that shortly.....
who knows, maybe there isn't many folks experiencing this, which would be a good thing ;)
in no way should anyone panic, as i said, it's a fairly easy remedy. One fellow tried to remedy by lapping the oprod, at the advice of a well meaning guy, but this only served to produce a very loose oprod and did not solve the issue.
 
Happened to my buddies Poly this summer when we were shooting on his property. I just figured he did something stupid last time he cleaned it. I think it was when he racked it. He got it back in the slot and it didn't happen again.
 
Easy to check if you have this issue. Grab the op-rod guide and see if it wiggles. If so bug the Doc or post here for the solution's.
As for you Doc...
Will you be going over this on your up coming clinic for us down here in the lowermainland?
 
yes.... that and MUCH more :D

it's fairly easy to disengage the oprod when racking by hand and this by itslf is not cause for much concern..... although when i custom fit a new oprod or do a build, the end fit is such that disengagement while racking the oprod is very unlikely.

the problem i am refering to generally will happen under fire.
sometimes on some rifles it is a ery loose oprod guide, or an oprod guide jammed over to one side..... and also barrel index as it affects oprod guide position. This causes the oprod to twist as it cycles..... and can lead to the oprod disengaing under fire.
but what if it happes on a rifle with correct indexing and a properly aligned and anchored oprod guide?

first we would inspect the oprod for a bend or twist with straight edge tools, not finding a twist or bend..... then what....
what i have found in a few of the newer rifles i have inspected with this issue is a machining imperfection inside the bottom of the oprod track, at the rear, which causes the oprod itself to ride up into the take down notch at the last inch of stroke.
It's a hard one to find... and many guys with experience with these rifles would probably look to modify or lap the oprod further...... but this would be bad as then the oprod is now looser overall during the rest of the stroke.

a prime example is the rifle belonging to charles emond here on cgn.... who's oprod skipped and there was sufficient force during the event to knock his bolt roller clean off during the disngagement of the oprod. Had me stumped for a bit as once i gave the rifle once over and test fire , it was actually binding up enough to short stroke.... and then the oprod disengaged itself.
the solution in the end was to condition the inside groove of the oprod track.... a very meticulous and lengthy endeavor as there is no tool out there to "fix"the issue without tooling up in the mill with the correct cutter used to cut that track in the first place.

so if anyone has this issue, p.m. me, it's not the end of the world. By the looks of this thread so far it does not appear to be a wide spread issue and that is a good thing.
 
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