You aren't kidding. Lots of parts to make. So far, I have altered the receiver, made the gas and recoil spring systems, the muzzle unit (used a salvaged P'14 sight), the receiver extension. Cam plate is installed, and tracks in the groove in the receiver extension. Next will be making the cam block on the bolt, and fitting it to the cam plate. I'll then know if the thing has a chance of operating, at least manually.
My grip looks very much like yours.