These come from R5, R10, R26, R29X and R500 bow kits so they will be different calibrations depending on the bow they came from.
This 8.75-inch aluminum scope features a variable speed and arrow drop-compensation setting for crossbows that shoot between 300 to 450 or 400 to 550FPS. Nine dot calibrated for 20-100 yards with a wide field of view for the 450FPS scopes. Eight dot calibrated for 30 - 100 yards for the 550FPS scope. Rheostat controlled, illuminated colored dots (red or green). An etched glass reticle and fully multi-coated lenses 1.5 to 5x optics. Flip up protective lens caps. Fog and weatherproof. Shock and recoil proof.
Mounting rings (7/8”) included.