This may be a stupid question from a newbie. But, what would it take to build an externally correct 70's era Russian 7.62x39 AKM from a Copes Romy parts kit. I've studied all the pics I can find. So far, all I can see to change is the furniture, rear sight, and proper selector markings and lose the big red "G". I plan on using a Global stamped receiver. Also what would be the proper metal finish? Thanks and I hope this isn't a redundant question.