I was considering either a Saiga in .223 or a WASR-2 Single stack as donor rifles for a 7.62x25mm conversion. I know the 5.45bolt will accomodate the case head of a 7.62x25mm, and the .223 might also with a small modification to enlarge it. Are there any legal issues with chopping up either of these for parts? Can I re-use the reciever after removing the trunion to add a longer bolt stop and press in the new barrel? Also, is there any reason why I couldn't tap and thread the front trunion for screws while leaving the rear trunion with its original rivets? I have never built an AK before but am very eager to try- I'm just short on heavy equiptment.
Part 2: Could a straight pull bolt action type rifle be made by simply replacing the barrel on 5.45 ak with a 7.62 x25mm barrel (and adding a magwell to feed 7.62x25mm)? I imagine this would work so long as the new barrel is in the same place as the original.
2B: Do you think a single stack 5.45 mag would feed 7.62x25mm, if the feed lips were elongated? how about double stack, or 7.62x39 for that matter?