Utg crossbow scope 1.5-6x36 a0 rgb bdc reticle 30mm tube FEATURES:Magnification:1.5 - 6XTube Diameter:30 mmObjective Diameter: 36mmEye Relief:3.5" - 4.0"Exit Pupil:8mm - 5.5mmLength:210mmMaterial:AluminumWeight:17.8oz Other Features: Red,gree,blue reticle, 30mm tube, medium profile picatinny rings, flip open lens caps, waterproof, adjustable calibration 250 to 475 fps 1/2 moa per click adjustment, ez-tap red/green bdc marker illumination to accomodate all weather/light conditions, 1.5-6x36, 3.5"-4" eye relief