Unless you are going to drag your rifle through sand storms, deserts, swamps and all kinds of other cra#. $900.00 for a Acog is just plain crazzy, even $500.00 for a Eotech is outragous. There are pleanty of good 223 scopes on the market, just pick a short one with bullet compensation for drop and have fun and enough money to actually buy ammo for the gun.
Just my 2 cents and a bunch of change.
This one's setup for out to 500 yards.
This one is for REALLY LONG RANGE.