My C7A2 has the upgraded Elcan A2 version on it. We zero'ed our rifle on the outdoor 100 M range here in Kandahar and it was right on target and maintained zero with a lot of banging, and crawling through the rocky and talcum like powder they call sand here. It is impossible to keep your weapon clean here. Functional yes...clean, no.
I have never had any problems with the Elcan despite all the negitive comments it seems to get on here. If you are competent, take care of it, and know how to use it, it is very effective. 1 MOA, if you know what you're doing, and take your time. Don't be afraid to buy one. (A2 Version of course)
We all know that CGN'ers must have the absolute latest in Military optics on their rifles, so they can take them to the civie range, look totally cool and MIL-SPEC, shoot a few rounds to make sure it's zero'd for zombie day, and take it back to their lockup to sit for the next time they get deployed to the target range.
here in Afghanistan, your personal weapons are beat to hell, optics banged like no tomorrow, and most everyone's weapons are customized to some degree, with accessories bought online! I even saw a CF guy with a hand braided sling. What ever works.
The Marines here are using the M16A2 with the RAS system and a ACOG. I asked then what they thought of thir optics, and they are also very happy with them. They also use versions of out Elcan on some of their other weapons here.