Founded in Southern California in 1997" NcSTARs mission is to consistently provide superior quality optics and sporting accessories at affordable prices. They are dedicated to providing superb customer service, setting the highest standard in the industry, with a warranty that is second to none. NcSTAR provides innovative and cutting edge optics and accessories by following the latest industry trends and listening to their customers feedback.Features : Quick focus eyepiece Fully multi coated lenses Blue and green color illuminated reticle 100-500 yard BDC calibrated for M193 55gr.