Hello everyone im looking for info if there's any out there on possible parts/things that might fit this gun. It has intrigued me and i think it might look great with my two double hump pump guns. My two things im looking for is the furniture and the action/reciever extension tube. Now the model 50 and sx3 look similar to the model 40. Can anyone shine on this gem? Has anyone had experience with these or have pictures of the action tube?