This stock is one of my absolute favorites. I had held onto it for a build of my own, but I no longer have a need for it. The figuring and color is fantastic. My favorite characteristic is the perfectly parallel "lines" that run down the right side of the buttstock. You can use this on your M40 build, but I have never seen an issued rifle with a piece of wood like this.
This stock was sanded and fitted with a vintage Remington 16601 buttplate and then finished with multiple coats of hand rubbed Boiled Linseed Oil.