I had an EOTech XPS2-0 on my 14 inch carbine (pinned and welded flash hider), worked well enough. I prefer a single dot and went to an Aim Point P.R.O. in a M.W.G. QD mount. I tended to hit my index finger on the top first knuckle with the EOTech and the Aim Point factory mount, when charging the carbine. My charging handle is on the left side of the carbine. When I moved the handle to the right side I didn't hit the sight, just like the handle on the left.