Vortex Optics Venom Red Dot Sight Quick-Release Mount Riser This handy mount quickly attaches the Venom Red Dot to your rifle while ensuring the correct lower 1/3 co-witness sight height. The positive lock,one-handed operation makes it incredibly simple to use. Type III hard-anodized machined aluminum construction keeps the package lightweight, tough, and durable. <span class="a-text-bold">Optical Quality:</span>Vortex uses dense optical glass painstakingly designed, shaped, and polished to eliminate flaws. Sophisticated optical designs and glass result in a brighter, sharper, more colorful image. <span class="a-text-bold">Superior Construction:</span>You may pay a bit more for optics using quality materials, sophisticated designs, and strict tolerances, but the result is greater reliability in the field. <span class="a-text-bold">Attention to Detail:</span>Our standards are exacting. Vortex engineers spend thousands of hours designing every part, testing every component, and scrutinizing every detail. If we dont absolutely love it, we know you wont either.