The mount is kind of flimsy and requires constant tightening in order to keep it in place. It‘s somewhat useful at night because of the tritium tipped sight post makes it easier to pick up a target for a deliberately aimed shot. It can also be used practically during recce for quick peeks without fishing for binos.
You‘ll find, sir, that a lot of people think they‘re junk. In my experience, American troops I‘ve encountered in training (a group of Marines at CTC Gagetown in particular) thought they were pretty ****ed nifty. They were swooning over our LAVIIIs too.
In a non-scientific experiment on a SATS range I found that shooters who get accustomed to irons tend to perform better in day shooting than they do with the C79. There is a significant distortion, however, from the fact that the focal length of the C79 sight is not well suited to the short length (18 metres) of a SATS range and thus image resolution is impaired.
If my unit ever gets the variant of the C79 designed for SATS I‘m going to repeat the experiment to see how shooters perform.