Aim Sports Red Dot Sight with 4 Different Reticles Open red dot sight with windage and elevation adjustments Four different reticle patterns and seven brightness settings to choose from Durable anodized aluminum is water- and shock-proof; mounts easily with standard weaver rail base 1X magnification, 33-millimeter objective aperture, 24 x 34 objective diameter, three-inch length, and 4.2-ounce weight Includes limited lifetime manufacturer's warranty