I purchased myself another AR today. It's a Colt MT6400C Match Target .223/5.56. I guess you can't have too many of these boogers. My other two are .223 only with match barrels and I needed one that would shoot 5.56 rounds. It will be in tomorrow and I will shoot it Friday. I am going to leave the open sights on this one until I get to where I have to have optic assistance to be able to shoot it accurately.