After blowing it up, and players leaving the area, when I came back alone later, this is what I found.

Also, when we (4+ players) approached the AA for the first time, there seemed to be an issue with getting C4 to activate. It was thrown into the shaded square around it, almost flush with the base.
The C4 seen on the south side of the X is the one O threw that wouldn't activate. It remained for the rest of the game.
Although after trying many times to set it off or shoot it, another player was able to throw C4 right next to mine and set it off with no issues. (I think that's about all the info I have. Thanks guys!)

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