Well, yeah, and that’s one reason i’ve always had a problem with some of the Trijicon ACOGS because they are marketed as combat optics but they make you stand out like a sore thumb in certain environments.  The TA01 is probable what many people consider to be the standard ACOG but many like the idea of having illuminated reticles in day light and there is a major trade off.  If I am deployed in a combat zone,  I want the kill flash and TA01NSN because I don’t want some giant neon strand telling a sniper where my head might be.

If you look closely at what many of our troops are using in Iraq and Afghanistan you will notice that they area very much aware of this.  Many use a rag of some sort oer the optics to limit the visibility.  Its funny that even Trijicon AGOGS as advanced as they are still can still be a liability in combat for the same reason any scope can.   Counter sniping teaches that we can locate any sniper that is in a certain line of sight from us just by the reflection off of his optics.  Even night vision can pick up scope optics at long ranges.  There are always trade offs with firearms and gear.