Delivering increased kinetic energy for extreme knockdown power, making them ideal for big game hunting, Ravin XK5 500 Grain Arrows are the most premium arrows Ravin offers. Featuring an incredible straightness tolerance of .001 (with 100-grain field tip or broadhead - NOT INCLUDED) so they are true to target as determined solely by the hunters skill. Approved for use with the Ravin R500 Series crossbows.