Crickett's Crickettinny Rail provides a longer mounting surface to utilize larger scopes or "red dot" style optics and will also accept rings with a standard 3/8" dovetail. This model includes mounting screws.This upgraded picatinny style rail provides a longer mounting surface to utilize larger scopes or red dot style optics and will also accept rings with a standard 3/8 inches dovetail. Features: Picatinny style rail also accepts 3/8 inches dovetail rings Utilizes the same mounting procedure as the standard Crickettscope mount