U.S. Optics FDNFX-10 10x40mm Rifle Scope 34mm Tube First Focal Plane HORUS H425 Reticle 1/10 MIL Elevation Windage Adjustment Matte Black Small FDN. Fixed at 10 power the FDN FX10 is built to withstand extreme hunting and environmental conditions all while delivering top-tier optical clarity and reliability. The FDN FX10 features a 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 and customization options that will undoubtedly meet your needs. Specifications for U.S. Optics FDNFX-10 10x40mm Rifle Scope 34mm Tube First Focal Plane: Manufacturer: U.S. Optics Objective Lens Diameter: 40 mm Magnification: 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: 11.3 ft at 100 yds Color: Black Weight: 25.7 oz Length: 12.98 in Parallax: 30 yds to infinity Illumination Type: LED Battery Type: CR2032 Width: 3.883 in Fabric/Material: Aluminum Height: 2.43 in Magnification Type: Fixed Condition: New Features of U.S. Optics FDNFX-10 10x40mm Rifle Scopes: Digital Red FFP H425 Reticle Ocular Lens Diameter: 37 mm 110 Click ER3K with 1/10 MIL Adjustments 48 Click US#1 Windage Knob with 1/10 MIL 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 FDNFX-10 10x40mm Rifle Scope 34mm Tube First Focal Plane U.S. Optics FDN FX10 H425: FDNFX-10 10x40mm Rifle Scope 34mm Tube First Focal Plane HORUS H425 Reticle 1/10 MIL Elevation Windage Adjustment Matte Black Small