I called LaRue today to order the QD pivot mount LT649. I had heard someone else that they had an Eotech mounted on the GG&G riser and with that they were the same height. I called Larue and told them I was using the Eotech 553 with built in mount and did they have a pivot mount that would sit a little lower and line up better with my 553. They apperently have one but it isn't listed on the website. I will let you guys know how it works when i get out there and shoot it.