Integrated Quick Release Weaver/Picatinny Mounting System Fit 20mm Weaver/Picatinny Rail Built-in Green Laser with Pressure Switch Built-in Sunshade Red & Green Illuminated with Mil-Dot Recticle Standard X-Y Windage and Elevation Click Adjustment 2.5x-10x Adjustable Zoom 40mm Objective Diameter Constructed of High Quality Aluminum with Hard Anodized Finish Shockproof, Waterproof and Fogproof