Update
I did talk to one of the CS ladies and she was very nice, but knew nothing about the guns. I did find out that the "assembly is the "Backplate and Grip". To me, this is not an assembly and I told them that! The Backplate, stripped is the backplate only with no grip!
Anyway, I cannot get to their website so I ordered the grip panels, buffer discs, and recoil plate. I could not remember the proper name of the screw in the rear, so I hope I have a spare with the locking spring & pin.
Man, this REAL assembly now will have cost me a small fortune, and problaby could have found one complete for less, but I will have one. GPC needs to update their descriptions!!!