Pinty Reflex Red Green Dot Sight Scope with Flip Up Lens Cover Cap & 20mm Mount Obj. 30mm Solid aluminum alloy construction with flip-up lens caps, durable and shock proof Red or green dual illuminated dot reticles with 5 level brightness control Multi-coated lens sealed with Nitrogen, water proof & fog proof, works great in all weather conditions Precision windage and elevation adjustments, features high/low profile quick release mount Fits standard 20mm Picatinny or Weaver rails