This Power Custom 1- Piece Picatinny Style Scope base is the perfect mount that you have been looking for for your marlin Camp Carbine in 9mm or .45. This is Fully CNC Machined from extruded aluminum and fully machined for precision fitting. Included are four mounting screws and an Allen wrench used to install. Accepts most modern Picatinny Style scope rings. Notes: Attaches to the factory pre-drilled and tapped holes in the Marlin Camp Carbine in 9mm or .45. Measures 5.325"x..825"x.465" Mounting hardware included FeaturesFully CNC machined from extruded aluminum for precision fittingAccepts most modern picatinny scope ringsIncludes 4 mounting screws and an allen wrench for installation.