It looks badass, Aimpoint's ACO - their new AR Carbine Optic made for AR sporting carbine rifles.
http://www.gunsandammo.com/first-look/first-look-aimpoint-carbine-optic/
It allows for easy, quick co-witnessing and battery longevity (1 year constant on).
http://www.amazon.com/gp/aw/d/B00OMA3HD6/ref=pd_aw_sbs_1?pi=SS115&simLd=1
