ZeroTech Optics The Thrive HD 4mm Riflescope 1.18in Tube First Focal Plane LR Hunter Illuminated Reticle Black. Equally at home on the range as it is in the field the THRIVE HD FFP will unlock a new level of precision in your rifle without sacrificing fast target acquisition on low magnification. Specifications for ZeroTech Optics The Thrive HD 4-16x44mm Riflescope: Manufacturer: ZeroTech Optics Objective Lens Diameter: 44 mm Magnification: 4 - 16 x Reticle: Illuminated Tube Diameter: 30 mm Reticle Focal Plane: First Focal Plane (FFP) Exit Pupil: 2.75 - 11 mm Illumination Color: Red Field of View Linear: 2.3 - 9.2 ft at 100 yds Eye Relief: 93 mm Color: Black Weight: 653 g Adjustment Click Value: 0.1 Mil Rad Adjustment Type: Mil Rad Parallax: 10 yds to infinity Illumination Type: LED Battery Type: Stand Alone Lithium Gun Type: Rifle Package Contents: ZeroTech Optics The Thrive HD 4-16x44mm Riflescope ZeroTech Optics TH4164FL-IR: The Thrive HD 4-16x44mm Riflescope 1.18in Tube First Focal Plane LR Hunter Illuminated Reticle Black