Do your PMs go back far enough ? It looks like a Boyds stock. You could email them the pictures, someone there might be able to judge it by the inletting. good luck.
I believe it's a marlin model 25 or 882 bolt action 22 clip fed. It appears to be inlettef for a bolt if not I would have said marlin model 70 clip version of the model 60 tube load.