Sako Optilock Scope Rings are machined from a solid block of steel, Cr-Mo alloy or stainless, just like our rifles.
Optilock rings are available in four heights and two diameters: 25,4 (1 in) and 30 mm to fit any scope. The inner scope saver ring is made of polymer and acts as a ball bearing to prevent the scope tube from being deformed. The 30mm mount height is 40.5mm and the scope max outer diameter is 75 - 83mm.