The earlier Scout grip frames (and the gun frame itself) were aluminum.
When the 'Frontier Scout '62' was introd'd in 1962,,the frame and grip frame material was changed to Zamac.
This to increase the overall weight of the pistol a bit as the earlier ones were thought to be 'too light'.
'Zamac' is a zinc alloy w/ (copper?) die cast metal that is used in a lot of different applications.
Those Ithaca M49 lever action single shot 22 rifles from the 60's and 70's had their frames cast of Zamac. Quite a few other guns have used it in both frames (22rf) and misc parts like trigger guards, butt plates, ect.
I'm not much of a welder
Aluminum alloys are weldable depending on which one they are.
Zinc alloys are weldable too but within limits and with special filler rod and techniques.
I think if you do some research on 'welding die cast zinc alloys' you'll find that it is possible and is done with special rod and O/A at a certain flame.
The joint strength may not be all that much, but the material itself isn't very strong either in those thin places.
A bit of extra reinforcement would help.
Perhaps one of the welding specialty/restoration shops could answer the question best and of course at what price.
Those extra Scout grip frames sold are sometimes rejects from the vendor that made them originally. They may be out of allaignment slightly, or undersize at one critical point so they were scrapped.
The ones I've seen needed quite a bit of work to be fitted and then some more to overcome the problem for which they weren't used in the first place.
Not all offered are probably that way, but it's something to watch for before moving forward with a weeks worth of filing and fitting.
