I know this question has been probly asked before but I can not find it. what is the best ACOG for the price that has the 223/5.56 with 55grn FMJ bdc but not all of the other whistles and bells. Can you get the bdc in another bullet/velosity configuration or are they just universal. just what a base model with a bdc out to someware between 600 and 800 yards to mount on my ar 15. what is your opinion of the ACOG's in reilability and clarity. I know alot of the military use them but are they worth the cost of arround $1000. is there a better mediam range optic that is comparable.