I recently purchased a Mosin Nagant for 75 dollars. This rifle fires nicely and adequately. The problem lies in that I would like to have a rear mounted scope installed and I would also like to change the bolt to something more compatible with a rear mounted scope. Has anyone here done something like this? I tried to call Doug, but failed to get through. I am looking for a ball park price on what this would cost me. I know that there are better rifles out there, but I really like this piece of history and I just want to make it a functional piece of my collection. Additionaly, sometime in this weapons history, someone attempted to blue the barrel or something and it has a big black spot of some sort of glossy substance. It does not cover the whole barrel. Any idea how to fix this or who could fix it for me? Thanks for the help!