The bolt on my newly acquired M39 is very hard to turn into the cocked position. It looks good and there is no abnormal wear that I can see. When I first took it out so I could clean the barrel it flew apart and I had trouble putting it back together. I didn't force it at all so I'm sure I didn't damage anything. One of the guys at the gunshop put it back together for me in about 10 seconds and took it apart and showed how to put it back together so I don't think he damaged it. It works just fine......it just takes some effort to cock it. Seems like I heard or read about this problem and how to correct it but remember where..........Any suggestions?