Not sure if this belongs in the Optics Forum, but this especially pertains to it being on an AR-15. Please move my thread if this is the wrong place. I am looking at getting an EOTech 553 to go on my LWRC M6-SPR, and was wondering if anyone else ran one on their rifle. How do you like the 7mm raised base? From what I understand, due to the raised base, it would cause a 1/3 co-witness with the BUIS. How well does this work for you? It seems like it would be finnicky, due to it being so high. Seems I'd have to bring my cheek off of my MagPul ACS stock to get a good sight picture. How is the integral A.R.M.S mount? Does it hold zero pretty well? I understand A.R.M.S. mounts are finnicky on different rails.....any info on that? Thanks for all input!