[sphinx1912]

I had no problems. Single and quad fired. It took a little bit for the quad to "see the plane" but then it rotated and fired like normal. But I guess the reaction time is normal too.

There must be a mod conflict somewhere in your system. You may have to substitute a different AA gun.
Do you have clear skies with no clouds?

Tried everything and not even getting a twitch out of them. I suppose it doesn't matter too much so long as it works for everyone else. I couldn't even begin to know how to isolate the issue. I hadn't touched the game in awhile and suddenly they don't work. Weird. Thanks for testing it on your own and letting me know that at least I'm not nuts.