Excalibur® Shadow Zone Illuminated Multiplex Reticle Crossbow Scope. Precise compensation when the light is low and the action is high!
The adjustable, illuminated multiplex design allows you to precisely compensate for the trajectory of any crossbow shooting between 250 and 350 FPS, for up to 50 yards, in EXACTLY 10-yard increments. Simply sight for 20 yards on the crosshair, dial in your crossbow's velocity, and you are automatically sighted for 30, 40, and 50 yards!
This gives you the opportunity to change arrows without having to relearn the trajectory scale or else to perfectly tune your scope to any crossbow. Virtually parallax free at normal crossbow shooting ranges and has sensible adjustment clicks of 1/2" at 20 yards.