m14 oprod rubs norinco barrel hard

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my m14 parts kit oprod when installed on my m305 rubs the bottom of the barrel hard, it doesn't come close to passing the tilt test. with the spring removed I have to pull it open VERY hard to get it all the way open it rubs bottom of barrel about 1/4 from the receiver.

the norinco oprod passes tilt test and does not rub

any ideas???
 
bent op rod? op rod not in correctly? compare the two side by side, take a straight edge to them. we like pics, you're more likely to get better answers. hopefully someone more knowledgeable than me chimes in.
 
Pantallica90 said:
I've got the problem as well except my USGI op rod wont even go in..
Click to expand...

What does "wont even go in" mean?

I have one installed on my Norc. It requires a knowing love tap with a rubber mallet to seat/unseat it from the assy notch.

Quite common with the USGI stuff. Goggle is your friend.

M
 
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I have had to hand fit every USGI op-rod tab to the each Chinese receiver they have gone into.

A bit of a touch with a file, to removing a fair bit of material.....

John
 
i had the same issue. slight filing of the op rod, and even needed a bit on the receiver. the norc just slid back and forth without the slightest resistance, USGI, needed a hammer at first.
 
Was going to start a thread and then i saw this thread.

Question... norc m305 original op rod lightly rubs on barrel. Ive got ~750 rnds through rifle, functions fine. Been wanting to solve problem for a while just never got around to it. Have been using grease as temp fix.

Any reason i cant file down op rod to solve issue?
 
ColKurtz said:
Was going to start a thread and then i saw this thread.

Question... norc m305 original op rod lightly rubs on barrel. Ive got ~750 rnds through rifle, functions fine. Been wanting to solve problem for a while just never got around to it. Have been using grease as temp fix.

Any reason i cant file down op rod to solve issue?
Click to expand...

I would recommend curing the disease as opposed to treating the symptom.....

That was meant to be a pun :D

Usually the op-rod rubs when something else is out of alignment. I would take a look to see if the barrel is over or under index and if the op-rod guide is square to the gas cylinder before I dug out a file.

John
 
The barrel index is good but I know the op rod guide is a bit out of alignment. It was rubbing since it came out of the box. The guide had a bit of play so i removed it and knurled the surface and mated the guide back on, with loc-tite to boot. Its definitely not square to the gas system but i dont think i can do much about it. That roll pin was a real nightmare to get back in.

The rifle shoots well (well enough for me), i can consistently ring an 8" plate at 200m with irons. The rubbing is the last thing i need to solve. Im saving my pennies to do a better build but this one has to do for now.

I appreciate the advice!
 
My M305 had that problem with the barrel properly indexed.

I bit of filing on the op-rod, a bit on the bottom of the barrel... fine now.
 
stevebc said:
My M305 had that problem with the barrel properly indexed.

I bit of filing on the op-rod, a bit on the bottom of the barrel... fine now.
Click to expand...

I had a similar problems with mine.
Indexed the barrel. Op rod guide was straight as an arrow. Op Rod was straight. Even swapped it out with a buddies to see if it was maybe just mine.
Same problem.
The bottom of the barrel looked like it was machined with a potato! It was not milled properly at all.
I took a file to the underside of the barrel slightly. Good to go now. Passes tilt test just fine now and hundreds of rounds down range with no issues.
 
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