I have a guide gun and understand that you are putting on the XS extended rail that go from the rear receiver screws to the rear sight dove tail Right? So you can use the gost ring peep sight with the scope off. So the scope is right in front of the gost ring.

You can't use aHand scope there is to much eye releif and I have a vxII 1-4x20mm and that is a scope with loads of eye releif but that still won't work its not enough. Now the Leupold and burris guide scopes are made for just that purpose. Do you have them confused with the handgun scopes? Everyone posissions there scope differntly mine is as far forward as the leuplod std ring & dove tail mounts will let me thats with the adjustment ring right to rear ring. Was that gost ring a quick detachable if so just get a Leuplod 1-4x20mm or 1.5-5x20mm there great scopes.

I had the SX gost ring sights on my gun before they offered the rails. I put the VXII 1-4x20mm on because of it huge field of view and have no issue with very close shots like 15-20 yards no issue and at 4x 150-200 yards is a verydo able shot.