Oak? I had one, once, (ended up selling it because it shot about 3’ to the left) and I swear the stock looked like oak…Hmmm, now I wonder… But I guess it doesn’t matter that much…In order to fix that rifle it would’ve required disassembly, pulling the barrel from the receiver, taking the receiver and putting it in a lathe, and refacing the face of the receiver, and then shaving about .008-.010 off the rear of the barrel, reassembling the receiver/barrel and resetting the headspace… The reason for all this is because the face of the receiver was probably slightly out of square. When the barrel was screwed into the receiver, the shoulder of the barrel hit the high side of the receiver face first, and literally pushed the barrel to one side. From what I’ve read, there’s supposed to be about a .005 gap between the receiver face and the barrel’s shoulder, but I’ve never actually seen that on M48’s, usually the barrel’s shoulder is butted up against the receiver’s face, and that’s not a problem as long as both surfaces are square. When they’re not, you can get some serious accuracy problems. Compared to German or Czech Mausers, the Yugo’s are kinda crude…