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. Sako 90 17mm Blued Extended Tikka Profile Optilock Scope Base S1102214439