Check the listing for details. MDT CZ 457 Scope Base 20 MOA Picatinny Rail Clamp On Dovetail Adapter 104488-BLK. Color: Black, Condition: New. Listed at 71.99 USD. MDT's Scope Base Picatinny Rails are a precise and reliable solution when it comes to mounting a scope on your bolt action rifle.DETAILSMDT’s Scope Base Picatinny Rails are designed to make the mounting of your optics easier. They are machined from 6061-T6 aluminum, then hard-anodized black for a durable finish. The underside of the rails are profiled to allow the rail to be mounted flush on the receiver and to match the geometry of the ejection port. These rails are designed with a 20 MOA incline providing additional elevation adjustment from your scope*. A recoil lug has been integrated in the underside rail profile on models where the action’s design allows for this feature.*Additional elevation adjustment will vary based on your scope specifications.SPECIFICATIONS1913 spec railsCNC machined from 6061-T6 aircraft grade aluminumType III hard anodized20 MOA railIntegrated recoil lugSA & LA optionsContoured for snag-free operationHARDWARE INCLUDED#6-48 TORX screws (rail base drilled to accommodate #8-40 screws also)