A brand new feature of the Sako 90 range is the inclusion of two rifle model-specific optics mounting interface options. The machined-in Picatinny receiver is a repeatable, accurate and flexible mounting system that has been chosen for models that are typically used with high-magnifying optics. The Sako 90 Optilock receiver is a more traditional and classic design for those models that are also used with open sights. The Sako 90 Optilock interface features a straight 17 mm dovetail with recoil slots at both ends for easy, secure and reliable scope or red-dot mounting or, if open sights are preferred, a clear and undisturbed view through the sights.