U.S. Optics FDN-10X 1.8-10x40mm Rifle Scope 34mm Tube First Focal Plane HORUS H425 Reticle 1/10 MIL Elevation Windage Adjustment Matte Black Small FDN. The FDN 10X 1.8-10X features a 42mm objective 6061-T6 aluminum 34mm tube low-profile ER3K elevation knob with a zero stop ergonomic capped US#1 windage knob integrated illumination and parallax knob rapid adjustable 180 degree magnification throw and customization options that will undoubtedly meet your needs. Make your next build stand out from the rest with the FDN 10X. Specifications for U.S. Optics FDN-10X 1.8-10x40mm Rifle Scope 34mm Tube First Focal Plane: Manufacturer: U.S. Optics Objective Lens Diameter: 40 mm Magnification: 1.8 - 10 x Tube Diameter: 34 mm Reticle Focal Plane: First Focal Plane (FFP) Exit Pupil: 3.2 mm Illumination Color: Red Finish: Type III Hard Coat Anodized Field of View Linear: 36 - 11.3 ft at 100 yds Color: Black Weight: 25.7 oz Length: 12.98 in Adjustment Type: Mil Rad Parallax: 30 yds to infinity Illumination Type: LED Battery Type: CR2032 Width: 3.883 in Fabric/Material: Aluminum Height: 2.43 in Magnification Type: Variable Condition: New W/E Travel at 100 Yds: 28 Mil Rad Features of U.S. Optics FDN-10X 1.8-10x42mm Rifle Scope Digital Red FFP MOA Scale Type 1 Reticle 110 Click ER3K with 1/4 IPHY Adjustments 48 Click US#1 Windage Knob with 1/4 IPHY Adjustments Recommended Butler Creek Flip-up Covers (NOT INCLUDED) FDN FX10 Objective: MULTIFLEX 33031 Eyepiece: Multiflex 13 & 14 EYE 21314 fits just over the diopter Multiflex 16 17 & 18 EYE 21618 fits past the diopter onto eyepiece housing Package Contents: U.S. Optics FDN-10X 1.8-10x40mm Rifle Scope 34mm Tube First Focal Plane U.S. Optics FDN 10X H425: FDN-10X 1.8-10x40mm Rifle Scope 34mm Tube First Focal Plane HORUS H425 Reticle 1/10 MIL Elevation Windage Adjustment Matte Black Small