Somthing very bad happened to my M305 and im still not sure why.

I think this may have been caused by misalignment of the operating rod guide. This could allow enough side travel to reduce the engagement on the bolt roller.









I’d never denigrate anyone who thinks it’s not safe to use either 308 Winchester or 7.62 NATO in the same rifle, but for those of you who believe that it’s not safe to use either 308 Winchester and 7.62 NATO in the same rifle, denigrate means to put down.
 
BadAsMo said:
...I'd never denigrate anyone who thinks it’s not safe to use either 308 Winchester or 7.62 NATO in the same rifle, but for those of you who believe that it’s not safe to use either 308 Winchester and 7.62 NATO in the same rifle, denigrate means to put down.
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I see what you did there...

LOL
 
ThatM305Guy said:
Okay guys.....here is the best I can come up with. My thoughts are that the tab on the op rod itself was either out of spec from the factory, or excessively worn (or both) and rocked itself juuuust far enough from the receiver to hit the outside corner of the roller, which caused it to be pushed in towards the bolt, and jamming in the process. At this point it began rubbing and peening the slot until it got so bad, that it jammed up completely.
She was sitting in a blackfeather stock that I painstakingly installed (it took me two full evenings) exactly to the instructions. I must have tilt tested it 10 times over the course of the installation. 100% had nothing to do with the op rod guide itself...there is just way to much rocking and play in the op rod. I have a new op rod in the pipe so we'll see how she fits....worth a shot for the price I'm paying.
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Either the tab was worn causing the tilt or the tab jumped out of its track.
You may not need a new bolt, if you can inspect and ensure the bolt roller stem has no cracks or that the roller is peened, you might be ok.

Here's a little demo of a stock Norinco oprods movement vs a re-tabbed and fit USGI. The amount of tilt on the stock oprod shows where the roller could strike the edge of the slot like the OP's if there was excessive play.

Stock Norinco


Re-tabbed USGI
 
I work at a metal recycling shop. Do you know who gets all the Mystery Metal? 'Mr Chow' is the joke around the yard.
Not saying it's right, or you deserve it ( Owned a few Norc's in the day myself ); just saying that you shouldn't be all that surprised. I knocked 3 bbl bushings out of a M203 before I bought a FSU one from Tradex. Chinese manufactured items should be suspect at best.
Feel free to flame away, but tomorrow the Sea Can will be getting all the metal that we can't sell in North America. It's going to China when it's full too, but not til it's good and full of Sh*t steel.
Remember that
 
tokguy said:
I work at a metal recycling shop. Do you know who gets all the Mystery Metal? 'Mr Chow' is the joke around the yard.
Not saying it's right, or you deserve it ( Owned a few Norc's in the day myself ); just saying that you shouldn't be all that surprised. I knocked 3 bbl bushings out of a M203 before I bought a FSU one from Tradex. Chinese manufactured items should be suspect at best.
Feel free to flame away, but tomorrow the Sea Can will be getting all the metal that we can't sell in North America. It's going to China when it's full too, but not til it's good and full of Sh*t steel.
Remember that
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Hahaha, I couldn't possibly disagree even if I wanted too. I'm a machinist by trade and there are ALWAYS problems with Chinese steel. Garbage.
These rifles seem to hold their own for the most part though. Hopefully one day soon the receiver will be the only original piece left. Tempted to strip and case harden the new op rod when it gets here.
 
The op-rod guide tang may need a trim.

M14.ca black arrow guide rods sometimes require a wee bit taken off so that the spring sits flush on the receiver. Twice out of 20 or so that I've installed.

The "Stainless" ones from Marstar will 90% of the time will require trimming.

The "American" made guide rods are about 50/50...

The only ones I've found that don't need a trimming are from S&J Hardware.... I've installed 40 or so of them in the last 2 years.

If the tang is too long you will get FTF from time to time and the BHO will be dodgie as well.
 
How'd you get your hands on a dlask gas lock for your m305? Seems they have been out of stock for ages.
ThatM305Guy said:
So I was out the other night and started having issues with my norc. Initially I didn't think too much of it because I just replaced the stock gas lock with the (beautiful) Dlask gas lock and was still fiddling with it and getting it set up properly. It started out with the rifle not cycling properly, or only extracting half way. But when I manually cycled it, the rifle functioned normally...until a couple rounds later, one jammed up the entire action. After I got it home and disassembled I found that the bolt roller had been pushed and jammed all the way in against the side of the bolt, and the op-rod had forced its way up, and away from the receiver. The (for lack of a better term) roller "runway" slot in the op rod has been peened out pretty badly. (ill try to put up a couple pictures when I get home tonight) obviously this is the effect of something, but I'm not quite sure what yet....its only a couple years old. Was shooting standard norc 7.62. Any ideas? Has anyone heard of this before? Also does anyone know of a source for either a new op rod, or a talented gunsmith? (in the red deer area)
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Folklorestatus said:
How'd you get your hands on a dlask gas lock for your m305? Seems they have been out of stock for ages.
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I was one of the first ones to snag it up on the latest run. Unfortunately they had a problem with whoever was threading the nuts that day and mine came with the threads cut only to half depth. Was able to chase it at work, but they took them down until they could figure out what was going on. Not sure if they have it sorted yet, or if they already did and are sold out again.
 
I was referring to the op rod guide that is attached to the barrel to confirm indexing. I was not referring to the op rod spring guide.

It looks to me like your op rod is not running true in the receiver raceway. That could be due to a op rod guide that is not indexed to the barrel, a barrel indexing problem or a op rod tab wear issue or manufacturing issue.
 
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