I would't worry much about the stock. It looks pretty good for a butthole stock.
I have one very much like that but it came with a blondish bushhole stock, is a slant-cut receiver made at 386 and sports a spring loaded firing pin. The finish on it is pretty good for a Mak..nice rifle.
Ironwood sells stocks for that receiver or do what I did and put a Romy dragnov stock on it and call it good.