I am interested in getting a Trijicon ACOG scope. I know that some of the places offer them with red dot sights on top of the ACOG's. Can all ACOG's accept red dot sights? Would I be able to order an ACOG scope and then if I feel the need later, add a red dot sight? What is required for mounting of the red dot sight onto the ACOG? Also, what red dot sights are compatable with the ACOG's? If you have any pictures, please feel free to post. Also, if you have any pictures of you scopes and sight pictures, please feel free to post. There are so many models of ACOG's that I'm a little lost as to what I would want. Thanks.