SKS Ejector Port Modification

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Geoff B

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There is a sticky that shows how to re-cut the back edge of the ejector port as copied here:

Originally Posted by supernova View Post
With the recommendation of a few members Ive decided to post a bit of info on a mod that Aramir recommended. It seems there is a solution to the SKS ejecting spent casings straight up in the air that looks nearly factory original and works like a dream. By clearancing a small portion of the ejection window, it will allow the ejector to kick the shells straight out to the right. I forgot to take pics before but you can compare to your own rifle to see how small an amount of material needs to be removed. On the lower left corner of the ejection window there is an angle that needs to be cut back to a smaller radius. Thats it! You dont need to lengthen the window any, just turn the angle into a small radius and you're done.

Has anyone else tried it? I'm tempted to do it to a Chinese SKS that I want to scope.
 
do it, takes like 5 mins with a decent dremel and touch it up with a little cold blue. forget who but someone suggested putting a piece of masking tape along each edge of the window so that its easy to see where to grind to. works well.
 
I did the mod without doing the gas port mod. My gun throws the cases 10-12 feet forward and to the right. I did the mod in hopes that I may recover brass but it beats the brass up pretty bad. I'm going to have to do the gas port mod to keep usable brass... but I probably won't go that far. At least people have stopped yelling at me for throwing hot cases at them though.

The mod will work great for keeping the cases from beating up a scope.
 
I recently scoped my SKS. Was planning to do the ejector mod, but with 200 rounds through it over the last week I haven't had any noticable ill effects from the default casing ejections. So this mod probably isn't worth doing for my rifle. Of course, it could vary with the ammo as well. So far I've been using both Russian & Czech milsurp ammo.

Here's my type 45 1954 Soviet Tula setup:

sksproject009-0.jpg


sksproject010-0.jpg
 
This is the entire original quote for those that were wondering:

Originally Posted by supernova
With the recommendation of a few members Ive decided to post a bit of info on a mod that Aramir recommended. It seems there is a solution to the SKS ejecting spent casings straight up in the air that looks nearly factory original and works like a dream. By clearancing a small portion of the ejection window, it will allow the ejector to kick the shells straight out to the right. I forgot to take pics before but you can compare to your own rifle to see how small an amount of material needs to be removed. On the lower left corner of the ejection window there is an angle that needs to be cut back to a smaller radius. Thats it! You dont need to lengthen the window any, just turn the angle into a small radius and youre done.
ejectionwindowmod3.jpg

ejectionwindowmod2.jpg

And touched up with some fresh bluing, reassembled
ejectionwindowmod4.jpg

ejectionwindowmod1.jpg

You can barely tell its been modified, until you start firing. Now I can mount a fullsize scope without worry, or an ugly shell deflector.
Click to expand...


umcalleg said:
forget who but someone suggested putting a piece of masking tape along each edge of the window so that its easy to see where to grind to. works well.
Click to expand...

That is a great idea to help keep everything straight and clean.


Mark
 
I wonder why this wasn't incorporated into the original design?
Maybe because they went to the AK series and didn't want to bother with the upgrade/changes?
 
Steiner said:
I wonder why this wasn't incorporated into the original design?
Maybe because they went to the AK series and didn't want to bother with the upgrade/changes?
Click to expand...

Simply because they had no issue with how the casings were being ejected I would imagine. On the battlefield, when you're potentially standing beside commrades, you probably don't want to be showering them from the side with hot bullet casings. In that instance having the casing eject straight up is probably better, since they would lose most of their dynamic energy fighting gravity.
 
My best geuss is the rifle was designed for side ejection originally and later changed possibly due to close spacing of Red Army soldiers on the firing line. Look at the action: the extractor, ejector and ejection window are all on the side. Why not angle it up like a VZ58 if they originally wanted top ejection? That little tiny corner is what changes the ejection path by almost 90 degrees. And yes, the tape line method is the best. Run one along the bottom of the ejection window and another from the top left corner going down, intersecting the other tape line at 90 degrees. Small radius in the corner and youre done. A small carbide burr is best, followed after by a stone to polish the surface. Test fire before bluing to make sure you took enough off. Once theyre ejecting at 2 to 3 o'clock youre gtg. Due to the push/pull design of the extractor/ejector in the action, casings will bounce off the ejector and fly forward a little.
 
I originally modified my ejector port with a slight radius (as shown in the the photos in post #6) but the odd casings were hitting my scope so I grounded the ejector port a little more to a 90 degree angle and it now works very well. From a standing position, the casings fly about 4 steps in a 2 o'clock direction.

Enjoy the mod
 
Dakk said:
What ammo are you using that has brass casings?
Click to expand...

PRVI FMJ from Budget Shooter Supply... also Bass Pro carries American Eagle FMJ. All brass cased, and it's about a buck a round. I bought it for a 3-gun match to preserve the metal targets. I won't buy that stuff again, it's not worth it.

For fun I'm sticking with surplus, and for competition and hunting I'm using Hornady V-max. It's steel cased, but it comes out to less than a buck a round.
 
Thanks. Was wondering if maybe there was some miltary surplus with brass casings or something. I'm thinking of picking up some SP ammo for my SKS, just in case I decide to try using it for deer hunting one day. I think its about $1 per as well.
 
Geoff B said:
There is a sticky that shows how to re-cut the back edge of the ejector port as copied here:

Originally Posted by supernova View Post
With the recommendation of a few members Ive decided to post a bit of info on a mod that Aramir recommended. It seems there is a solution to the SKS ejecting spent casings straight up in the air that looks nearly factory original and works like a dream. By clearancing a small portion of the ejection window, it will allow the ejector to kick the shells straight out to the right. I forgot to take pics before but you can compare to your own rifle to see how small an amount of material needs to be removed. On the lower left corner of the ejection window there is an angle that needs to be cut back to a smaller radius. Thats it! You dont need to lengthen the window any, just turn the angle into a small radius and you're done.

Has anyone else tried it? I'm tempted to do it to a Chinese SKS that I want to scope.
Click to expand...

Yep.do it. Best thing I ever did at least now I know where the cases are headed. Still get the odd one that would hit a scope, but all in all its better than before, and the wife can get within 10 feet without a helmet. Took me no more than 5 mins start to finish.
 
Well thanks all, I guess I have a project for my holidays -install the Choate scope mount and grind out the radius on the ejection port.
Geoff
 
Geoff B said:
Well thanks all, I guess I have a project for my holidays -install the Choate scope mount and grind out the radius on the ejection port.
Geoff
Click to expand...

Well, I did the ejection port mod and it seems to be a success. I installed the Choate mount and things went well also. That baby ain't gonna move!
Next I added a Barska 3-9 X 42 scope. That seems well made for a Chinese scope, cost about $120. It dialed in OK, but at an over-all length of 9", it covers the stripper-clip guide. No good at all. It is bad enough that the Choate makes stripping and assembly a pain, but to have to load all 5 one at a time won't work. I wanted some magnification, but to get a scope that won't extend past the 5" long mount may be impossible. Next trip to the range, I'll try the Vortec Sparc with the 2X doubler.
Geoff
 
ghostntheshell said:
I use the sparc on my sks with bc-tactical mount. Works well but the casings hit it too much. So I've stopped shooting it until I do this mod.
Click to expand...

The ejection angle really changed with the mod and your sparc should be safe.
The Choate mount brings the eyepiece back far enough to use it with the doubler and still use the stripper clips. I don't think the doubler will work in the forward mount.
 
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