HiViz Litewave Interchangeable Ruger GP100 Sight -It fits all GP100 revolvers with adjustable rear sight and spring pin (above muzzle) removable front sight, does not fit models with cross pinned front sights. Fits all GP100 revolvers with adjustable rear sight and spring pin (above muzzle) removable front sight Does not fit models with cross pinned front sights It includes 3 LitePipes in red, green and white and a key to interchange the LitePipes