Optilock Ringmounts are one piece units that combine the rings and the base so no additional hardware is required to mount the scope.

Optilock Rings require the purchase of Optilock Bases. You must select the diameter (one inch or 30mm) and the ring height for the scope you are installing. Use the Height Selector For Optilock Mount Systems chart at the bottom of the page.

Optilock Bases are required for Optilock Rings. Sako rifles require you to use the Short, Long, and Extended Sako Optilock Base Selection Chart on the this page to select the Short, Long, or Extended base to fit the action length of the rifle. All Tikka rifles accept the same Tikka Universal base. All Optilock bases are available in blue and stainless finish.

Quickmounts utilize a lever to mount the unit and most include the rings

Read This Before Ordering

Please note that most Sako and Tikka rifles require only low Optilock mounts for up to a 2.48"(63mm front belle diameter) one inch tube scope, and up to a 2.64"(67mm front belle diameter) 30mm scope tube. Most first time mount buyers purchase mounts that are too high. Please see the chart below for Sako/Tikka recommendations for mount height vs. scope belle diameter. The smaller number (belle size) is for heavy barrels and the larger number (belle size) is for standard barrels. Also see chart on this page for Ring Height Selection for Tikka Ringmounts. Please don't forget to measure your scope cover outside diameter when measuring diameters to select ring height.

This is the information I received back from the Tech.

The chart is correct for all tube lengths, however keep in mind that these are maximum outside objective bell diameters that are listed on the chart, not the scope manufacturer's listed objective lens size.

For example, a typical 50 mm scope will have an actual outside diameter of 58 mm.  You can see from the chart,  in the first column, that the maximum objective diameter with low rings combined with a standard contour barrel is 55 mm. That means the objective bell diameter of a typical 50 mm scope is 3 mm to large and will hit the barrel when the scope is mounted. The second column listing is to be used on rifles that have a bull or heavy type barrel, you can see that these listed maximum objective bell diameters are less than in the first column, indicating the smaller available bell clearance when mounting scopes on rifles with thicker barrels. Most scope manufacturer's will list the outside objective bell diameter on their websites or catalogs scope specification charts, this way you can determine which ring height to choose without having to have the scope in hand.

A good rule to keep in mind is:
Use low rings for scopes with up to 40 mm lens size
Use medium rings for scopes with 50 mm lens size
Use high rings on scopes with larger than 50 mm lens size

 

Read This Before Ordering

Please note that most Sako and Tikka rifles require only low Optilock mounts for up to a 2.48"(63mm front belle diameter) one inch tube scope, and up to a 2.64"(67mm front belle diameter) 30mm scope tube. Most first time mount buyers purchase mounts that are too high. Please see the chart below for Sako/Tikka recommendations for mount height vs. scope belle diameter. The smaller number (belle size) is for heavy barrels and the larger number (belle size) is for standard barrels. Also see chart on this page for Ring Height Selection for Tikka Ringmounts. Please don't forget to measure your scope cover outside diameter when measuring diameters to select ring height. The numbers on the the charts are not for the advertised lens diameter of the scope, but they are the actual measured diameter of the outside diameter of the scope including lens cap for the forward belle of the scope.

 

This is the information I received back from the Tech.

The chart is correct for all tube lengths, however keep in mind that these are maximum outside objective bell diameters that are listed on the chart, not the scope manufacturer's listed objective lens size.

For example, a typical 50 mm scope will have an actual outside diameter of 58 mm.  You can see from the chart,  in the first column, that the maximum objective diameter with low rings combined with a standard contour barrel is 55 mm. That means the objective bell diameter of a typical 50 mm scope is 3 mm to large and will hit the barrel when the scope is mounted. The second column listing is to be used on rifles that have a bull or heavy type barrel, you can see that these listed maximum objective bell diameters are less than in the first column, indicating the smaller available bell clearance when mounting scopes on rifles with thicker barrels. Most scope manufacturer's will list the outside objective bell diameter on their websites or catalogs scope specification charts, this way you can determine which ring height to choose without having to have the scope in hand.

A good rule to keep in mind is:
Use low rings for scopes with up to 40 mm lens size
Use medium rings for scopes with 50 mm lens size
Use high rings on scopes with larger than 50 mm lens size

Please note that the new Sako Model 85 uses the same rings and bases as the Model 75