I am selling these one piece Optilok Sako ring mounts.
As you can see in the pic they are 30mm stainless and you will be able to mount upto a 50mm objective with these.
I have always thought they are better in design than the 2 piece as you do not have a point of failure in terms of base to ring fitting.
They are in excellent condition and all screw heads are un nurled etc.
I am asking £50 for anyone interested (roughly half price of new) plus P&P at cost.