This rifle have been Bubba’d and needs a little TLC. It came with a Barska 4x scope on it, and I’m looking at replacing it with a Leupold VX-R 3x9. The current bases are in rough shape, and I’m looking to replace them. Talley seems to say they can’t be used it the clip slot is still on the receiver. And suggestions on what bases work good on these military Mausers?