I have a friend that was in Iraq that mentioned that magnification was what helped them identify IED wires at a distance where guys with irons and Eotechs couldn’t seem them.   I’d have to say that the ACOG is still an advanced combat sight, but they are expensive.   The thing that makes the ACOG work so well is having the right ammo matched up to the bullet comp.  Once you figure out where the hold overs are, this optic is fast.  At rifle competitions at my club, I always notice that the guys that could nail target the fastest all had Acogs.

There is much to think about when selecting an optic or sighting system for your Carbine.   For Close Quarters Combat, zero magnification is usually your best option because it can be a problem if there is a need for seeing beyond 100yds or more.   When someone comes with a Trijicon ACOG that has variable magnifications that goes from zero to 20X that’ll be a big step forward.   Unfortunately it’s hard to really say what you have on your gun because there are so many variables.   Eotech has a magnification option for their sighting system, but it adds considerable weight and limites where you put backup irons on the gun.