Vortex Optics Spitfire Prism Scopes The Spitfire 1x Prism Scope excels in close to medium range shooting applications where fast target acquisition and speed is of the essence. The prism based design allows for a compact optical system without sacrificing optical quality. Fully multi-coated lenses with anti-reflective coatings offer bright views even in low light conditions. The reticle is etched directly on the prism ensuring shooters have an effective point of aim at all times regardless of illumination. A selectable red/green illuminated reticle features five intensity levels to match the situational conditions. Comes mounted at a lower 1/3 co-witness height of 40.4 mm from the optic center to base surface. Remove the mount riser if a lower 30 mm mounted height is desired. With shockproof construction, the Spitfire withstands recoil and impact while nitrogen purging and o-ring seals ensure fogproof and waterproof performance.