So I recently bought myself a Russian SKS and I am looking to make some improvements and modifications to it. I am going to buy a stock and mounts and other stuff but what I was looking around and some people say to upgrade the gas tube. Could someone please tell me the benefits of upgrading from the factory gas tube. Also are there any other recommended upgrades.
Side Question: What is the importance of all the serial numbers on the gun matching. A bunch of us made a road trip to buy 6 of these from a dealer and he pointed out that all the serial numbers matched all over the gun.
Side Question: What is the importance of all the serial numbers on the gun matching. A bunch of us made a road trip to buy 6 of these from a dealer and he pointed out that all the serial numbers matched all over the gun.


















































