Coldstar Tactical Red and Green Dot Illumination Reflex Holographic Sight with Rails Hunting Rifle Gun Optics Scope with 4 Reticles Holographic Reflex Scope with Illuminated Reticles Tubeless design with 33mm reflex lens aperture provides a wide field of view, suitable for normal and rapid-firing shooting of moving targets. Windage and elevation adjustable (tools included) Red and green reticles with four patterns Integrated mount for standard 20mm rails.