So basically because these Saiga's have pistol grips and can accept high capacity magazine they are considered "unsporting"? What a load of horse hockey (thanks G. Bush Senior for 922r)! I really did not even think of 922r effecting the Saiga as a "sporting" shotgun.
I have been building AK's for a few years so the conversion should be pretty straight forward.
I wonder if those receiver and parts kits can be imported?