Hi, I have a chinese sks and wondering how to tell if the barrel it is pinned or threaded ? It's from factory 306 and in the 16 million range, my other chinese sks is in the 15 million range but has a buldge in the barrel going into the reciever so I am thinking maybe one is pinned and the other is threaded? If so which one should I use and which one should I just have as a safe queen for now ? Cheers


















































