I've measured my Weaver K2.5 60-B. From the ocular bell adjustment threads to the adjustment turrets is 3.550". The adjustment turret is .980", adjustment turret to front is 3.050".
Eye relief on mine is approximately 3.70" - 4"
Therefore to put the adjustment turret in front of the front ring the outside to outside dimension of the rings cannot be much over 3.550" I have about a 1/4" of threads exposed I suppose could be put under a ring. Just thinking, an 06 round's max length is 3.340" and I know the rings have to be further apart than that on the inside dimension so I don't think it's possible.
Phillip McGregor (OFC)
"I am neither a fire arms nor a ballistics expert, but I was a combat infantry officer in the Great War, and I absolutely know that the bullet from an infantry rifle has to be able to shoot through things." General Douglas MacArthur