SKS to Bolt Action only

Inquisitor

Inquisitor

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Anybody take their op-rod out and make the sks a straight pull bolt action carbine? I thought I saw this mentioned on some thread.

Would there be any benefits to doing this?

My main question is how effectively those vents on the side of the gas tube disperse the pressure. Should the vents not be large enough, could the bolt body not possibly cycle partway, instead of not at all?
 
The tappet rod underneath the rear sight should prevent gas from blowing directly back in the shooter's face. I doubt that the bolt would cycle.
I cannot see any benefit whatsoever, though. And the SKS gas port is a large one, so there is going to be a lot of gas entering the gas cylinder, and then venting off.
If you want it altered to bolt action, drill and tap the gas port and install a plug.
 
Inquisitor said:
Anybody take their op-rod out and make the sks a straight pull bolt action carbine? I thought I saw this mentioned on some thread.

Would there be any benefits to doing this?

My main question is how effectively those vents on the side of the gas tube disperse the pressure. Should the vents not be large enough, could the bolt body not possibly cycle partway, instead of not at all?
Click to expand...

no benefit , just more gas going into the gas cylinder due to no resistance, slightly less power for the bullet and hella of a cleaning and scraping.

but if you could plug the gas from going into the gas cylinder then slightly more power for the bullet, maybe better grouping but im not sure.
 
I removed my op rod while doing load work (easier to recover the brass).

What I found was surprising - loads were FAR more accurate with the rod removed. I was getting cloverleaf groups at 50 yards and just under 2" at 100 without the op rod, and 4-5" groups with the op rod.

I didn't notice any gas issues without the rod - certainly nothing in my face or escaping the hand guard. The gas tube didn't get any noticeably dirtier, either (the rod doesn't STOP any gas from escaping, it just puts it to use first and then vents it anyway. How much do you thing a 40lb spring reduces the flow of 10,000+ psi of gas, anyway?)
 
I did this once, I fired 360 rounds, W/O my piston in, I did not encounter any gas to my face ( rear sight base directs it into the reciever ) or increase of carbon, I did find that it was a bit more accurate. I did find that after awhile my bolt was getting sticky, But it was just as dirty if I fired it semi auto.

I had another project SKS that I welded the gas port shut, removed the rear sight base, gas block as well as front sight as a project to show SKS's can be accurate, But I yield to finish the project because could not find the receiver mount I needed.
 
sometime for fun i read all the sks posts. there were 5 or 6 mentions of ppl removing the op-rod, and groups seemed to shrink. im going for coyotes this weekend on my friends property, and there are tons around, so i think id want the ability to make a quick follow-up shot over some supposed increase in accuracy. My sks shoots just under a 2" group at 100, 4.5" at 200... i think i got really lucky with the rifle i got from s.i.r.
im using a receiver cover scope mount with a tasco on it... interestingly, i dont loose zero. the bolt for the rear tech sight i have installed holds the mount very tightly, and i really took my time with the fitting.
the only reason id take the rod out is to avoid anything happening with the softer primer in the igman stuff ill be using. is that a reality or in my head?
 
gas flow faster thru empty space than when its pushing against a rod, maybe not by much but still something, then the biggest resistance will occure when the rod stop travelling rearward, the gas moves the rod approx 3/4" back , thats as far as it will go, not far enuff to reach the vents which are located at 2 1/4", (altho some of the gas will escape around the rods head).

without the rod , greater empty space, more gas will easily fill the entire space of the cylinder and also escape thru the vents on the sides, that is why i said it more cleaning, less power for the bullet.
 
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A bolt action only SKS won't be more accurate than a semiauto and will have a lower POI because of less pressure. If you want a bolt action shooting 7.62x39, a bolt action JW-20 or Ruger will be a better choice. The main benefit of an SKS is its fast target acquisition and shooting speed.
 
I purposely built a straight pull SKS. New barrel, no gas port 10 shot mag! It shoots quite well, barrel is a .308 not .311 as well.
Called it the DIFFIGAFF
Scott
 
m39a2 said:
I purposely built a straight pull SKS. New barrel, no gas port 10 shot mag! It shoots quite well, barrel is a .308 not .311 as well.
Called it the DIFFIGAFF
Scott
Click to expand...

hi scott, may we see a pic of your famous DILLIGAFF ? you still got it?


Inquisitor said:
yeah really dont want another rifle in 7.62x39. I dont think there is another rifle in that caliber that is as much fun as the sks. anyway, im not going to do it
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thats right, lets say there isnt a rifle in that caliber that is as much fun and cheap as the sks. altho i think the CZ858 comes a distance runner up.
 
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