I haven’t played AP since map lottery was implemented, but I remember there being an axe in the wall in one of the spawn rooms. If you’ve ever seen John Carpenter’s The Thing, you get the reference. Just now, though, I was in a skirmish lobby and noticed it was missing. I know you can knock it out of the wall, but I didn’t think it despawned if you did, so was it removed, or did somebody come through earlier and just abscond with it somehow?
It’s in one of the spawns of the Labs sub-map, I think. If you get into the hallway above the doors, at the left-side end is a red emergency light, and underneath is where the axe usually is.