Bushnell AK Optics AK25 1x25mm Red Dot Sight, Matte Black (tilted front lens) Quick-pointing dot with 11 intensity settings, 25mm objective for virtually unlimited field of view at 100 yard Integral mount works on any Picatinny rail or weaver-style case Waterproof, Fogproof and shockproof. Measures 2.4 inch long and weighs only 3.7 ounces Tilted front lens reflects LED light to create red dot. Red dot LED light source secured inside the scope with adhesive Red dot may appear blurry or misshapen if the dot intensity is set too high for the ambient light conditions