Dusty,
I could build a cruiser with this Polar, it has the square back tang, and I do have a brand new Lee Six stock, but it is for the tapered tang! I don't have a mill but I do have a buddy that will let me use his to recon tour the tang, and doing that would not have an impact on still using it as a rail gun. I have considered buying a new rail gun and turning the Polar into a Bag gun, only because I have never shot a bag gun! Sure seems like most of us that shoot are tinkering with different options all the time!