The Wise Men Company compares the affordable Holosun 510c to the more expensive 512 holosight from EOTech in this video... "Both of these optics are great just for the record but Holosun 510c has the EO Tech 512 beat in a number of areas. These two optics do use different technologies. The Holosun 510c is loaded with features that a lot of paying customers desire from an optic and it is all at lower price point compared to the EO Tech 512. EO Tech is a tried and true company that has proven its optics work all over the world. What do you guys think?"