I have a Yugo SKS with a U series serial number. This means it was from 1984, near the end of the cold war. I have read that if it was made before 1974 there's a good chance it was issued in the war with Bosnia. I also read that when they were imported in large numbers, a few years back, the crates came with log books of each SKS's status, issue date, etc. Unfortunately, these books were lost or discarded. Is there anyway to tell if my SKS rifle was issued or not? I know it went through 2, and possibly 3 owners before me, when I got it, it had the same ATI fiberglass stock on it, that it does now. It still has the original bayonet and grenade launcher. However, upon closer inspection, the bolt and bolt carrier are the same serial number, but not the same as the original SKS. They are the only non original parts, besides the stock.