depends on how much you want to sell me that acog for
i have a buddy over in bagdad right now that was issued an acog over our usual aimpoint m2's he loves it. so from that aspect i would say keep the acog. but from an illumination aspect, i would say that it is'nt your best bet if you do a lot of low light shooting, or shooting at dusk.
i'd say keep the acog and buy an aimpoint magnifier
