The updated Spitfire HD Gen II prism scopes offer ultra-fast target acquisition while still being usable even without illumination. The prism design and etched reticle solve the distortion problems for users plagued by astigmatism. The updated optical design provides improved resolution, and cuts chromatic aberration, and the streamlined look and flush mount turret design makes for a smaller, lighter, and faster optic. With the new mounting system, you are no longer limited to just one mounting height | Vortex Spitfire HD Gen II 3x Prism Scope