We don't offer the service of machining this stock for our rear tang. This is something that we hope to offer in the future but we are having difficulty keeping up at this time. We do offer this service with the purchase of our supergrade premium rifle.
Machining instructions for the rear tang:
The tool that you will need is 1/2". After measuring the part give (+) .030 on the Z axis and (+) .005 on the x & y axis.