Sks ejection issue

Ganderite

Ganderite

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Farm south of North Bay
I have a Russian re-furb. Put a Red Dot on the rear sight base and the third shot I fired blasted an empty case through the rear lens...

A bit late, I have decided I have to do that trick of cutting a smaller radius into the ejection port.

But, on examination of my rifle, it looks like the Russians were already aware of this trick and have already modified the radius.

Here is a picture of my rifle. Anyone know if this is common on refurbs? Or did Pvt. Ivan do it?

IMG_0034.jpg


Here is what an unmolested ejection port looks like:

IMG_0042.jpg
 
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Hmmm, I've never seen one cut at refurb Ganderite. I would think that private Ivan wouldn't have done that either (the Gulag isn't really the resort it's made out to be:p) The question remains as to why it spit the case forward though, I would recommend making a 90 degree "square" with masking tape and open up the receiver a bit more. That should get the cases out with the vengeance that would make an AR cry. :)
 
on mine i put that corner a 90degree and i grinded a good part more than just put it a 90 degree and now it eject most of the time a 3o clock and the brass fly to 5 feet to maybe 30 feet
 
Mystery solved!

I took the bolt out and clamped the receiver in a vice, ready to square it up. I could then clearly see that someone before me had already take a file to the receiver and started the job. Wasn't me.

I finished the job and will test tomorrow.
 
I squared off the ejection port on my refirb SKS and found it worked quite well. Not only did I square it off, but I took it back about 1/8" further to reduce the chance of the casing hitting the receiver and going in some strange direction. My Cases now eject at 2:00 on a 45 deg forward angle (I hope I'm making sense, sill on first coffee) and my cases have never hit my scope after over 1k rounds. I also added holes in my gas tube, but that was just so I could police up my brass/steel easier. I don't recommend doing the gas tube mod unless you have the need: I haven't had a problem with it, but I guess the potential is there when you mess with something that already works. I look forward to hearing how this works out for you, I suspect you'll like it.
 
I filed the rear of the ejection port square.


I tested the rifle and the brass goes to the side, not up. When I cycle an empty piece of brass slowly, I can see how it hits the side of the port. It looks to me that if the side is moved back a bit, that would be a GOOD THING. I am going to use a round file to set it back a bit.

Here is the AFTER picture of my first effort:

IMG_00442.jpg
 
I think most guys use a dremel grinding stone, about 1/2" diameter, to trim down the radius. Still have to do it myself as it seems to be a positive improvement to the ejection path.
 
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