Easily acquire ranges quickly and accurately with the BUK OPS X-Factor crossbow range-finding scope. The X-Factor features a built-in angle-compensating laser rangefinder that is activated instantly with a simple press of a button. Hold the rage button to enable Active Scan Mode to range moving targets. Combining all the top technologies with easy to use dependability. With the X-Factor Speed Dial feet per second (FPS) precision reticle you can fine-tune your optic to match the arrow speed of your crossbow with a simple turn of a dial.