Thanks guy's for those comment's !
For manufacturing them,im thinking about it,since i have a lot of potential buyer,and i did this one on my spare time,beside school and a new born baby i dont have any time left to do some more myself,but maybe going to a local machine shop to get a cost price of the receiver.
And im thinking if i go that way ill do folding stock and full AK stock,ill see how it goe's.