Monstrum R04R Ultra Compact Red Dot Reflex Sight with Weaver/Picatinny Rail Mount Ultra lightweight red dot suitable for use with a variety of pistols and firearms Precision 3 MOA red dot with easily adjustable windage and elevation settings Flexible eye relief, suitable for almost any shooter or firearm Mounts easily to any Weaver/Picatinny rail Sturdy anodized aluminum construction with black matte finish