A lot of gun with wood underribs started life as a full stocked and became half stocked as a matter of necessity. A soldered underrib is not only hard to solder on after the fact, but it would require refinishing the barrel as well. The cure is a wooden underrib, that attaches to the lugs that originally secured the forearm. Living in California, I have seen wooden underribs on nearly every school of Longrifle ever made. It seems the long trek across the plains took it toll on Longrifle forearms.
Hungry Horse