Kingman factory replacement sight rail for the Spyder Xtra, Rodeo or smilar marker. This sight rail includes an integrated beavertail. It may fit on other rear cocking models, but no guarantees. The 3/8in dovetail rail is "V" notched for line of sight targeting. Constructed of aluminum, anodized Matt Black. No mounting screw included. Overall length is 5 ½ inches. 2 inch tall. Weighs 1.3 oz.