Pricey, but oh so clear - Trijicon ACOG 3.5x35 Scope, Dual Illuminated Crosshair .223 Ballistic Reticle w/ TA51 Mount, Red TA11J, Amber TA11J-A, Green TA11J-G

ACOGs have a reputation for being pricey, and they are. But the clarity on this glass is amazing. (Mine is on a Colt M4 LE6920 Magpul FDE) The best part of the 3.5*35 is the added eye relief for quick target acquisition. The 3.5 is beefier than the 4.0 but you also get a better down range width. Green reticle has less wash-out than others I have looked at. Only issue I have is the size does prevent me from using a flip-up rear site should I need to, as I would have to remove the ACOG complete for positioning. Delivery was fast and the product arrived well protected in it's case and box. I am glad with my purchase and will use this site again.