Sako 90 Blued Extended Tikka Profile Optilock Scope Base The Sako 90 17mm Blued Extended Optilock Base is a high-performance mounting component precisely machined from solid steel to provide a secure and robust interface for your firearm&';s optics. This 17mm "Extended" base is specifically engineered for rifles with the Sako 90 Optilock interface, which features a straight (non-tapered) dovetail with recoil slots at both ends for repeatable accuracy. The extended profile is an ideal choice for shooters using scopes with short tubes on long-action receivers, as it allows for optimal eye relief adjustment by bringing the rings closer together. Designed to fit both Sako 90 Hunter/Bavarian models and Tikka T3/T3X rifles, this base features a matte blued finish to minimize glare and comes clamshell-packed in a pair with necessary installation hardware. Details: Batteries Required: No Color: Blued Fit Details: Fits 17mm straight dovetails with recoil slots For Gun Type: Rifle Material: Solid Steel Sport Type: Hunting Weight: 0.25 lbs Item Condition: New Product Type: Scope Rings/Mount + Base Style number: S1102214439