Item: For the money, the Norc AR-15 is a pretty darn good gun.
Item: The AR platform is easy to manufacture, esp. compared to the M14-style rifles that sell like hotcakes
Item: Everybody LOVES shooting .308/7.62x51 rifles [except for the cost, maybe].
I know Norinco is only peripherally in the business of making civilian/consumer guns, but it seems to me that a basic AR-10 style rifle that cost anywhere south of the $1000 mark would be a runaway hit anywhere they could be sold.
Just daydreaming here...thinking out loud...