Here's an additional thought on the serial number matching thing. May not apply to everyone but applies to one of my SKSes.
I bought one where everything matched (or so it seemed), though it was clear that the stock was a refurb and the matching serial number was stamped on it (it was a 1953, the stock should have had the Tula star plus the year plus the serial number etched in...it just had the serial number).
But where it would have been nice to have a matching serial number was on the gas tube (even though I know it's typically electropenciled, if at all, for the matching). This gas tube was definitely not the original that came with the gun. How do I know? Because the tolerances for fit was not there - not to mention there is a very, very, very mild colouration difference. Several people mentioned to me that my complaint about the release lever been extremely stiff and that I needed a plier or tool to move it was because it is fairly new and unused. That wasn't it at all, because upon closer inspection, the tube side with the fatter cylinder when mated onto the gun was not fully 100% even. It was very hard to tell with the naked eye but with a closer inspection one side of the cylinder was pressed in much more than the other - and it can't be fixed unless I sand either the connector on the rifle or the end of the gas tube cylinder. As a result, for me to have a better chance of working that gas tube release lever, I had to press down on the gas tube and push it forward with significant force.
All my other SKSes that had matching serial number gas tubes did not have this problem and the release lever moved nicely. Maybe I got a faulty refurbished gas tube, but having no similar problem with the matching ones, it's another reason why I like matching.
I bought one where everything matched (or so it seemed), though it was clear that the stock was a refurb and the matching serial number was stamped on it (it was a 1953, the stock should have had the Tula star plus the year plus the serial number etched in...it just had the serial number).
But where it would have been nice to have a matching serial number was on the gas tube (even though I know it's typically electropenciled, if at all, for the matching). This gas tube was definitely not the original that came with the gun. How do I know? Because the tolerances for fit was not there - not to mention there is a very, very, very mild colouration difference. Several people mentioned to me that my complaint about the release lever been extremely stiff and that I needed a plier or tool to move it was because it is fairly new and unused. That wasn't it at all, because upon closer inspection, the tube side with the fatter cylinder when mated onto the gun was not fully 100% even. It was very hard to tell with the naked eye but with a closer inspection one side of the cylinder was pressed in much more than the other - and it can't be fixed unless I sand either the connector on the rifle or the end of the gas tube cylinder. As a result, for me to have a better chance of working that gas tube release lever, I had to press down on the gas tube and push it forward with significant force.
All my other SKSes that had matching serial number gas tubes did not have this problem and the release lever moved nicely. Maybe I got a faulty refurbished gas tube, but having no similar problem with the matching ones, it's another reason why I like matching.