I am not an expert on the model 41, but I believe the model 46 and model 41 the barrels will interchange.

As for the light weight field barrel made from a 7 inch barrel that did not past muster in the accuracy test, has this ever been confirmed?

Also, I may be incorrect here, but I believe the older model 41 5 inch barrels had milled front sights, if that is the case there is no way they could be a shortened down 7 inch barrel.

Maybe an expert or someone who has a 5 inch barrel made in the late 50's era can tell us.

Also there were several variations in the 5 inch field barrel. With a ramped front sight, red ramp front sight, and target type front sight, unramped.

Also, my model 41 has a light weight field barrel which I purchased several years ago.

The rear sight has two white dots, which I have heard is a rather rare variation in itself.

al