You are probably going to need the highest rings. Ruger's web site recommends a #5 for the front ring and a #6 for the rear ring for scopes with an bell OD of 52 mm. They are available in blue or stainless steel finish and in both 1" and 30 mm scope tube diameters.Garth69 said:thanks for the help. The objective lens is 50 MM the scope is a 6.5 x 25 x 50 VX3i