Understand that you will also have to alter the extractor, feed rails and possibly the mag box to accomplish a satisfactory conversion to a magnum cartridge
This is on a Zastava M70 action. I have their mag bottom metal and follower and have ordered a mag extractor. I don't think the commercial feed rails will need altering and if so well within reach of getting done properly. This is for a left-hand action or I would have been able to just get a right-hand mag action fairly easy if I was right-handed. In fact, I have a right-hand mag action sitting here now.
Just need the bolt face opened up professionally and not for a stupid price.