I have a S&W M&P 15x Ar-15 and I currently have an Eotec 512 sight on it but I want something with a little more magnification. I have looked at the 3x and 4x magnifiers for the Eotec but they seem to move the sight picture to the right a little bit for some strange reason. Has anyone used this setup and if so how do you like it? Would it be as good as getting an ACOG or does the ACOG blow it out of the water? I like the versatility of the Eotec with the flip to side magnifier but am always a little hesitant of something that claims to do everything well. What are your thoughts?