Can anybody identify this scope base and ring set ? , it came with my BLR when I bought it ( had low grade scope at the time ) then put a new Leupold on the rifle .
That's what I always thought , but I don't recall ever seeing a Redfield logo looking like this one ...
They have to be Redfield/Leupold rings. The style of ring you have is called a "Leupold Standard (STD)". It is designed to have the front lock in by rotating 90*, while the rear rings have a groove on either side that holds the rings to the base with adjustable screws. This allows you to adjust your scope's windage upon initial installation to get you close to the correct windage setting. This requires minimal adjustment of the reticle at the turret, thus allowing maximum range of scope adjustment in the field.