Tinker,
The scope is a 4X Unertl with a 3/4" tube. The distance between the centers of the scope blocks is 6 1/4 inches. I purchased the Krag without a scope, but the blocks were still on it. I found this really pristine Unertl and it just looks right on the rifle. I have loaded some .25-35 handloads with the intent of taking a Pronghorn with it but it has not happened yet.

Thanks.

John - Another old Texan.