The best acog i have used - Trijicon ACOG 3.5x35 Scope, Dual Illuminated Red Horseshoe/Dot M249 Ballistic Reticle, 9.0MOA RMR Sight

The ta11 offers the most flexibility of the Acogs offering great eye relief and maintaining a good fov. The Sdo goes beyond this with a more refined reticle offering more reference points for holds and wind. Having owned Amber, red, and green acogs the red is definitely the one my eye is most drawn to and the circle dot reticle is my favorite. The larue mount is a nice addition as well. The dual illum rmr is pretty underwelming, in bright sun it blooms and in low light it is dim. Looking from dark to light or using in conjunction with a weapon light washes out the reticle completely. The kill flash also causes a noticeable decrease in light transmission.Overall I think the msrp is obcene for an acog considering the pricing of similar models but it is cool that it is in use by the usmc and offers some unique features.I think this optic is slightly better than a regular ta11 horseshoe dot for some of the above reasons but think most people would do better to buy that and a battery rmr due to the staggering price difference and noteable issues concerning the dual illum rmr unless they are building a clone or are just in love with the reticle that the Sdo offers. I had been creeping on this optic for over a year when a deal came by that I couldn't pass up so I bought and am quite happy overall with my purchase