Took the 1 week old Eotech 517 to the range today. Mounted on a AR15 (M4 CMMG Lower/16" LMT flattop upper). The sight worked fine and does indeed speed up sight acquisition over the iron sights. My issue is the balance it gives to the rifle, I really do not care for the feel of the carbine with the Eotech attached. Feels "top heavy" to me. Am I the only one who feels this way? I am going to post the Eotech for sale on the forums here as I can not see myself ever getting use to the feel of the AR with the Eotech on it. I really wanted to like the Eotech but no go here. I would like to make clear I am not bashing the Eotech at all, great tool but just not for me. I guess I will go back to the iron sights. On a bright spot I got my PS90 sighted in with the compact ACOG which I have been meaning to do for awhile What a great little set up that is. I alos put a Kimber SIS Ultra in layaway. I wanted to get one before Kimber stops production. Seems like a great little 1911.