I have two of the Norinco Mak-90s and the only thing I did was convert them to the fiberforce stock. The stock was about 50 bucks.
Me and my kids have put so many rounds through those rifles I could not even imagine how many. I have had them for several years and have not had one problem at all.
I remember we used to get the ammo for about $1.50 a box of 20 back when I got those rifles and we could plink all day long at those prices.
I am thinking of getting a Polish AK-74 to add to our small collection.
Yup.....I think you got a good rifle indeed!
J&G sales has those stocks as well as others