Developed in conjunction with Charlie Melton, Navy Seal Team Sniper and Trainer, the RT-S Mod 7 1-8x28IR has a First Focal Plane (FFP), illuminated reticle for a true one power magnification similar to a "red dot" type sight, where both eyes are open for quick target engagement in close-quarters combat. The tactical optic offers a distinct advantage once the magnification is increased, giving the ability to accurately engage targets and range estimate in every conceivable tactical situation. Capped Elevation and Windage Turrets with Zero Reset Aircraft Grade Aluminum with Rugged Design Ready for the Toughest Environments 100% Waterproof, Fog proof and Shockproof (tested up to 1200 G's) 1/2 MOA Quick Windage and Elevation Adjustment Locking illumination control with 6 daylight-bright settings Fast-Focus Eyepiece Assembled in EP-Level Clean Room Dry Nitrogen Purged and Sealed Utilizing Nitrogen gas, the optic is purged and sealed to ensure optimal performance in all weather conditions for the life of the optic. Precision Quality Assurance Every Riton product goes through a rigorous quality control process by a certified technician in Tucson, AZ. Each product you receive has undergone. Riton HD Glass The Riton High Density (HD) glass delivers 99.5% light transmission for enhanced clarity and optimal sight picture. Riton Performance Coating Incorporating proprietary fully multi-coated lenses, all Riton optics feature low light enhancement, full wide band, anti-scratch and anti-reflective Riton Rugged Construction The Riton Rugged Construction incorporates the application of 6061-T6 aircraft-grade aluminum, CNC machined one piece tubes, and Type III Hard Coat Anodize Specifications Magnification: 1-8 Parallax Setting: Fixed at 100 yards Tube Diameter: 34mm Objective Lens Diameter: 28mm Focal Lens Position: Tactical- First Focal Plane Lens Coating: Fully Multi-Coated, Full Wide Band, Waterproof Coated, Low Light Enhancement Reticle: Riton Tactical Illuminated Reticle Field of View at 100 yds: 142ft @ 1x - 17.5ft @ 8x Material: 6061-T6 Aircraft Grade Aluminum Weight: 25oz/709g Length: 10.9in/277mm Eye Relief: 4in/101mm Exit Pupil: 14mm @ 1x Click Value at 100 yds: 1/2in/12.7mm Adjustment Range: 175 MOA Mounting Length: 7.3in/186mm