Designed for use with the ESS Chassis and Tikka T3/T3X Barreled Action, the MDT High Scope Base Rail is a perfect optic mounting solution. The underside of the rail has been profiled to allow the rail to be flush mounted to the receiver, as well as to match the geometry of the ejection port. Other features include a 20 MAO incline, providing additional elevation adjustment to your scope. In addition, the High Scope Base Rail is precision machined from a solid block of 6061-T6 aircraft grade aluminum for excellent durability without adding any unnecessary weight, and is compatible with both long action and short action Tikka T3/T3X barreled actions. Features: Designed for use with the MDT ESS chassis and LA/SA Tikka T3/T3X barreled actionsFlush fits to receiver Matches the geometry of the ejection port Built-in 20 MOA incline MDT ESS Tikka T3/T3x SA/LA Blk Tall Scope Base 103157-BLK