Got my SKS from SIR

The guys at Marstar left me a message last week saying they received a shipment, I believe theirs are not mil. surp , and if I remember the guy said they are pinned barrels.......though anything seems to be better than what I got from S.I.R...I might get one there myself






v65magnafan said:
I ordered a Marstar Norinco SKS on Thursday.

Do theirs have the same problem?


Arrrrgh.
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Marstar: Yes, pressed and pinned. After I heard that, I searched the SKS forums on this. I found out that even an HK or two is pressed and pinned.

No definitive evidence that pinned is less accurate or durable than screwed.

I don't think it'll make any difference to me. And at $139?
 
PerversPépère said:
These "increasing headspace series" rifles were spotted not by Lever but by their customers because it became evident only on firing, so be careful and look at the junction of the barrel and the receiver; if there's a bright mark showing, it could be that the barrel is going forward and increasing headspace by the same token.
Another cause of brass ripping is a rough chamber. Check if there is light rust in the chamber or something causing roughness. On SKSes, the barrels are chromed but the chambers aren't.
If the chamber is not mirror-like, you could try polishing it with some 000 steel wool and motor oil at the end of a small split wooden dowel spun with an electric drill.
Go easy and look often.
Good luck!
PP.:)
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If the barrel is coming loose from the receiver, I would guess, that I could also see that by looking at the allignment markers on the barrel and receiver?? Seems ok to me, but I did peek inside the chamber right now, and it is far from polished. It has a slight rusty color to it, and also seems to be two small imperfections that look like small dots. Hard to tell if they are raised or dimpled spots though. I tried to run a small screwdriver over them to see if I could feel anything, but did not.
 
Well I tried the steel wool and drill, but still cannot get it all shiny, still has rusty color to some of the chamber. I wonder that since I received this SKS with hardly any cosmo on it, that this rust has pitted the chamber ??? or is more seriously rusted than I think ???



PerversPépère said:
These "increasing headspace series" rifles were spotted not by Lever but by their customers because it became evident only on firing, so be careful and look at the junction of the barrel and the receiver; if there's a bright mark showing, it could be that the barrel is going forward and increasing headspace by the same token.
Another cause of brass ripping is a rough chamber. Check if there is light rust in the chamber or something causing roughness. On SKSes, the barrels are chromed but the chambers aren't.
If the chamber is not mirror-like, you could try polishing it with some 000 steel wool and motor oil at the end of a small split wooden dowel spun with an electric drill.
Go easy and look often.
Good luck!
PP.:)
Click to expand...
 
Looking at your pic of the separated case, it looks as though you have a gross headspace problem. One thing you could look yourself is if the bolt has some play left once it is closed. Get the receiver cover and the recoil spring out and slide the bolt carrier back and front. You should see clearly the rear of the bolt sliding and tilting down in its locking recess.
Try to push on the rear of the bolt once it is closed and see if there's forward play in it.
But this won't tell us the chamber's dimensions.

One test that could be done easily with an empty case would be to load it with a very small load of pistol powder (about 4 grains of W-231 or HP-38) and cap this with a Parowax stopper in the neck.
On firing, the powder will form the case to the chamber but there will not be any extraction.
Once you eject the formed case, you could measure and compare that casing with an unfired one and see if it has stretched.
PP.
 
I looked at a batch of 8 Chinese surplus, remanufactured SKSs at a local gun shop. One was pressed and pinned, the rest were threaded. One had all matched serial numbers, one had matched bolt, receiver and floor plate numbers and the rest were completely mismatched. While they all looked ok I'm a bit wary about what I'm seeing. My impression is that getting a good one is just "luck of the draw". I would lean more towards a new Norinco which is actually cheaper at Marstar than these were.
 
For clarification, the T56 military type 3 receiver with pinned barrel is a perfectly sound design and a logical progression in SKS development from a nation that built more SKS and used it longer than any other country.
 
well I had thought I had a good one since it was not issued and was new, and all parts had matching numbers except the trigger . Thanks for all the suggestions you guys have had, and PP, that stuff you mentioned is way out of my league ( for now...hope to learn more) I think I will send it back to SIR, and maybe look into the $139 one from Marstar, or maybe be lucky and pick one up on the EE. Oh, I did notice that with the bolt closed it is quite loose.
 
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