greetings from southern vermont... i got a Krag from my dad before he died a few yeares ago with an old side mount badly drilled and tapped into the receiver and a weaver model 298 (?) scope atached to it.  the scope was so far to the rear that it interfered with the safety, so i took it off.  i would guess that it's a 3/4 inch (nominal; it mices to .753).

send me your 'snail mail' address if you want it- you can have it for free- i hate to see something not go to use.

drop me a note at williams@cheshire.net