I owned a scope set up like that back in the early 70s. The scope rings are spring loaded some way, so all you have to do is pull back on the scope and lift out. The only thing I disliked about the scope was that as you turned the power ring to a higher power, the crosshairs would not stay centered, would move off to one side; not change impact of bullet on target, just move to the side. Nice looking Sako
