Designed for Federal's Black Cloud ammunition for optimized downrange performance; Available in Mid Range and Long Range models to suit different shooting distances; Flite Control Wad compatibility for enhanced performance with less residue; Mid Range model can handle all steel shot sizes, including those exceeding 1550 fps; Long Range model not recommended for steel shot larger than BB or faster than 1550 fps; Backed by Carlson's lifetime warranty for reliability and peace of mind