Steambow AR-Series-Scope 4x32 Black. The scope can be mounted directly on a Picatinny rail. This scope is best suited for the AR-6 Survival but can also be used with the Tactical or Compact if used in combination with the magazine lid with the built-in Picatinny rail. Specifications for Steambow AR-Series-Scope 4x32: Manufacturer: Steambow Magnification: 4 x Objective Lens Diameter: 32 mm Color: Black Package Contents: Steambow AR-Series-Scope 4x32 Steambow 476: AR-Series-Scope 4x32 Black