UUQ Tactical 4 Reticle Red Dot Open Reflex Sight with Weaver-Picatinny Rail Mount for 22 mm Rails Excellent choice for rapid-firing and moving targets Light weight water-resistant and shockproof features enhance your performance in all climate conditions 4 reticle patterns offer unlimited eye-relief and corrected parallax Allen head screw type windage and elevation click adjustments with locking screw Built-in picatinny mount base for easy sight remounting. By adjusting distances and focus as well as the brightness of lights we can get clear reticle.