The CZ 557 Short Action Picatinny Scope Base provides a solid mounting platform with 20 MOA built-in elevation for extended long-range shooting capabilities.CZ 557 Short Action 1-Piece Picatinny Base20 MOA built-in elevation cantHeavy duty construction for reliable scope mountingOne-piece design for maximum strength and accuracyPicatinny rail system for universal scope ring compatibilityEssential for precision shooters looking to maximize their CZ 557's long-range potential with secure scope mounting and enhanced elevation adjustment range.